functions.js

   1 var hotkeys_enabled = true;
   2 var debug_mode_enabled = false;
   3 var xmlhttp_rpc = Ajax.getTransport();
   4 var hotkey_zone = 0;
   5
   6 /* add method to remove element from array */
   7
   8 Array.prototype.remove = function(s) {
   9         for (var i=0; i < this.length; i++) {
  10                 if (s == this[i]) this.splice(i, 1);
  11         }
  12 }
  13
  14 function browser_has_opacity() {
  15         return navigator.userAgent.match("Gecko") != null ||
  16                 navigator.userAgent.match("Opera") != null;
  17 }
  18
  19 function is_msie() {
  20         return navigator.userAgent.match("MSIE");
  21 }
  22
  23 function is_opera() {
  24         return navigator.userAgent.match("Opera");
  25 }
  26
  27 function is_khtml() {
  28         return navigator.userAgent.match("KHTML");
  29 }
  30
  31 function is_safari() {
  32         return navigator.userAgent.match("Safari");
  33 }
  34
  35 function exception_error(location, e, silent) {
  36         var msg;
  37
  38         if (e.fileName) {
  39                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
  40
  41                 msg = "Exception: " + e.name + ", " + e.message +
  42                         "\nFunction: " + location + "()" +
  43                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  44
  45         } else {
  46                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  47         }
  48
  49         debug("<b>EXCEPTION: " + msg + "</b>");
  50
  51         if (!silent) {
  52                 alert(msg);
  53         }
  54 }
  55
  56 function disableHotkeys() {
  57         hotkeys_enabled = false;
  58 }
  59
  60 function enableHotkeys() {
  61         hotkeys_enabled = true;
  62 }
  63
  64 function xmlhttp_ready(obj) {
  65         return obj.readyState == 4 || obj.readyState == 0 || !obj.readyState;
  66 }
  67
  68 function open_article_callback(transport) {
  69         try {
  70
  71                 if (transport.responseXML) {
  72
  73                         var link = transport.responseXML.getElementsByTagName("link")[0];
  74                         var id = transport.responseXML.getElementsByTagName("id")[0];
  75
  76                         debug("open_article_callback, received link: " + link);
  77
  78                         if (link) {
  79                                 debug("link url: " + link.firstChild.nodeValue);
  80
  81                                 var w = window.open(link.firstChild.nodeValue, "_blank");
  82
  83                                 if (!w) { notify_error("Failed to load article in new window"); }
  84
  85                                 if (id) {
  86                                         id = id.firstChild.nodeValue;
  87                                         if (!document.getElementById("headlinesList")) {
  88                                                 window.setTimeout("toggleUnread(" + id + ", 0)", 100);
  89                                         }
  90                                 }
  91                         } else {
  92                                 notify_error("Can't open article: received invalid article link");
  93                         }
  94                 } else {
  95                         notify_error("Can't open article: received invalid XML");
  96                 }
  97
  98         } catch (e) {
  99                 exception_error("open_article_callback", e);
 100         }
 101 }
 102
 103 function param_escape(arg) {
 104         if (typeof encodeURIComponent != 'undefined')
 105                 return encodeURIComponent(arg);
 106         else
 107                 return escape(arg);
 108 }
 109
 110 function param_unescape(arg) {
 111         if (typeof decodeURIComponent != 'undefined')
 112                 return decodeURIComponent(arg);
 113         else
 114                 return unescape(arg);
 115 }
 116
 117 function delay(gap) {
 118         var then,now;
 119         then=new Date().getTime();
 120         now=then;
 121         while((now-then)<gap) {
 122                 now=new Date().getTime();
 123         }
 124 }
 125
 126 var notify_hide_timerid = false;
 127
 128 function hide_notify() {
 129         var n = document.getElementById("notify");
 130         if (n) {
 131                 n.style.display = "none";
 132         }
 133 }
 134
 135 function notify_real(msg, no_hide, n_type) {
 136
 137         var n = document.getElementById("notify");
 138         var nb = document.getElementById("notify_body");
 139
 140         if (!n || !nb) return;
 141
 142         if (notify_hide_timerid) {
 143                 window.clearTimeout(notify_hide_timerid);
 144         }
 145
 146         if (msg == "") {
 147                 if (n.style.display == "block") {
 148                         notify_hide_timerid = window.setTimeout("hide_notify()", 0);
 149                 }
 150                 return;
 151         } else {
 152                 n.style.display = "block";
 153         }
 154
 155         /* types:
 156
 157                 1 - generic
 158                 2 - progress
 159                 3 - error
 160                 4 - info
 161
 162         */
 163
 164         if (typeof __ != 'undefined') {
 165                 msg = __(msg);
 166         }
 167
 168         if (n_type == 1) {
 169                 n.className = "notify";
 170         } else if (n_type == 2) {
 171                 n.className = "notifyProgress";
 172                 msg = "<img src='images/indicator_white.gif'> " + msg;
 173         } else if (n_type == 3) {
 174                 n.className = "notifyError";
 175                 msg = "<img src='images/sign_excl.gif'> " + msg;
 176         } else if (n_type == 4) {
 177                 n.className = "notifyInfo";
 178                 msg = "<img src='images/sign_info.gif'> " + msg;
 179         }
 180
 181 //      msg = "<img src='images/live_com_loading.gif'> " + msg;
 182
 183         nb.innerHTML = msg;
 184
 185         if (!no_hide) {
 186                 notify_hide_timerid = window.setTimeout("hide_notify()", 3000);
 187         }
 188 }
 189
 190 function notify(msg, no_hide) {
 191         notify_real(msg, no_hide, 1);
 192 }
 193
 194 function notify_progress(msg, no_hide) {
 195         notify_real(msg, no_hide, 2);
 196 }
 197
 198 function notify_error(msg, no_hide) {
 199         notify_real(msg, no_hide, 3);
 200
 201 }
 202
 203 function notify_info(msg, no_hide) {
 204         notify_real(msg, no_hide, 4);
 205 }
 206
 207 function printLockingError() {
 208         notify_info("Please wait until operation finishes.");
 209 }
 210
 211 function cleanSelectedList(element) {
 212         var content = document.getElementById(element);
 213
 214         if (!document.getElementById("feedCatHolder")) {
 215                 for (i = 0; i < content.childNodes.length; i++) {
 216                         var child = content.childNodes[i];
 217                         try {
 218                                 child.className = child.className.replace("Selected", "");
 219                         } catch (e) {
 220                                 //
 221                         }
 222                 }
 223         } else {
 224                 for (i = 0; i < content.childNodes.length; i++) {
 225                         var child = content.childNodes[i];
 226                         if (child.id == "feedCatHolder") {
 227                                 debug(child.id);
 228                                 var fcat = child.lastChild;
 229                                 for (j = 0; j < fcat.childNodes.length; j++) {
 230                                         var feed = fcat.childNodes[j];
 231                                         feed.className = feed.className.replace("Selected", "");
 232                                 }
 233                         }
 234                 }
 235         }
 236 }
 237
 238
 239 function cleanSelected(element) {
 240         var content = document.getElementById(element);
 241
 242         for (i = 0; i < content.rows.length; i++) {
 243                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 244         }
 245 }
 246
 247 function getVisibleUnreadHeadlines() {
 248         var content = document.getElementById("headlinesList");
 249
 250         var rows = new Array();
 251
 252         for (i = 0; i < content.rows.length; i++) {
 253                 var row_id = content.rows[i].id.replace("RROW-", "");
 254                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 255                                 rows.push(row_id);
 256                 }
 257         }
 258         return rows;
 259 }
 260
 261 function getVisibleHeadlineIds() {
 262
 263         var content = document.getElementById("headlinesList");
 264
 265         var rows = new Array();
 266
 267         for (i = 0; i < content.rows.length; i++) {
 268                 var row_id = content.rows[i].id.replace("RROW-", "");
 269                 if (row_id.length > 0) {
 270                                 rows.push(row_id);
 271                 }
 272         }
 273         return rows;
 274 }
 275
 276 function getFirstVisibleHeadlineId() {
 277         if (isCdmMode()) {
 278                 var rows = cdmGetVisibleArticles();
 279                 return rows[0];
 280         } else {
 281                 var rows = getVisibleHeadlineIds();
 282                 return rows[0];
 283         }
 284 }
 285
 286 function getLastVisibleHeadlineId() {
 287         if (isCdmMode()) {
 288                 var rows = cdmGetVisibleArticles();
 289                 return rows[rows.length-1];
 290         } else {
 291                 var rows = getVisibleHeadlineIds();
 292                 return rows[rows.length-1];
 293         }
 294 }
 295
 296 function markHeadline(id) {
 297         var row = document.getElementById("RROW-" + id);
 298         if (row) {
 299                 var is_active = false;
 300
 301                 if (row.className.match("Active")) {
 302                         is_active = true;
 303                 }
 304                 row.className = row.className.replace("Selected", "");
 305                 row.className = row.className.replace("Active", "");
 306                 row.className = row.className.replace("Insensitive", "");
 307
 308                 if (is_active) {
 309                         row.className = row.className = "Active";
 310                 }
 311
 312                 var check = document.getElementById("RCHK-" + id);
 313
 314                 if (check) {
 315                         check.checked = true;
 316                 }
 317
 318                 row.className = row.className + "Selected";
 319
 320         }
 321 }
 322
 323 function getFeedIds() {
 324         var content = document.getElementById("feedsList");
 325
 326         var rows = new Array();
 327
 328         for (i = 0; i < content.rows.length; i++) {
 329                 var id = content.rows[i].id.replace("FEEDR-", "");
 330                 if (id.length > 0) {
 331                         rows.push(id);
 332                 }
 333         }
 334
 335         return rows;
 336 }
 337
 338 function setCookie(name, value, lifetime, path, domain, secure) {
 339
 340         var d = false;
 341
 342         if (lifetime) {
 343                 d = new Date();
 344                 d.setTime(d.getTime() + (lifetime * 1000));
 345         }
 346
 347         debug("setCookie: " + name + " => " + value + ": " + d);
 348
 349         int_setCookie(name, value, d, path, domain, secure);
 350
 351 }
 352
 353 function int_setCookie(name, value, expires, path, domain, secure) {
 354         document.cookie= name + "=" + escape(value) +
 355                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 356                 ((path) ? "; path=" + path : "") +
 357                 ((domain) ? "; domain=" + domain : "") +
 358                 ((secure) ? "; secure" : "");
 359 }
 360
 361 function delCookie(name, path, domain) {
 362         if (getCookie(name)) {
 363                 document.cookie = name + "=" +
 364                 ((path) ? ";path=" + path : "") +
 365                 ((domain) ? ";domain=" + domain : "" ) +
 366                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 367         }
 368 }
 369
 370
 371 function getCookie(name) {
 372
 373         var dc = document.cookie;
 374         var prefix = name + "=";
 375         var begin = dc.indexOf("; " + prefix);
 376         if (begin == -1) {
 377             begin = dc.indexOf(prefix);
 378             if (begin != 0) return null;
 379         }
 380         else {
 381             begin += 2;
 382         }
 383         var end = document.cookie.indexOf(";", begin);
 384         if (end == -1) {
 385             end = dc.length;
 386         }
 387         return unescape(dc.substring(begin + prefix.length, end));
 388 }
 389
 390 function disableContainerChildren(id, disable, doc) {
 391
 392         if (!doc) doc = document;
 393
 394         var container = doc.getElementById(id);
 395
 396         if (!container) {
 397                 //alert("disableContainerChildren: element " + id + " not found");
 398                 return;
 399         }
 400
 401         for (var i = 0; i < container.childNodes.length; i++) {
 402                 var child = container.childNodes[i];
 403
 404                 try {
 405                         child.disabled = disable;
 406                 } catch (E) {
 407
 408                 }
 409
 410                 if (disable) {
 411                         if (child.className && child.className.match("button")) {
 412                                 child.className = "disabledButton";
 413                         }
 414                 } else {
 415                         if (child.className && child.className.match("disabledButton")) {
 416                                 child.className = "button";
 417                         }
 418                 }
 419         }
 420
 421 }
 422
 423 function gotoPreferences() {
 424         document.location.href = "prefs.php";
 425 }
 426
 427 function gotoMain() {
 428         document.location.href = "tt-rss.php";
 429 }
 430
 431 function gotoExportOpml() {
 432         document.location.href = "opml.php?op=Export";
 433 }
 434
 435 function getActiveFeedId() {
 436 //      return getCookie("ttrss_vf_actfeed");
 437         try {
 438                 debug("gAFID: " + active_feed_id);
 439                 return active_feed_id;
 440         } catch (e) {
 441                 exception_error("getActiveFeedId", e);
 442         }
 443 }
 444
 445 function activeFeedIsCat() {
 446         return active_feed_is_cat;
 447 }
 448
 449 function setActiveFeedId(id) {
 450 //      return setCookie("ttrss_vf_actfeed", id);
 451         try {
 452                 debug("sAFID(" + id + ")");
 453                 active_feed_id = id;
 454         } catch (e) {
 455                 exception_error("setActiveFeedId", e);
 456         }
 457 }
 458
 459 function parse_counters(reply, scheduled_call) {
 460         try {
 461
 462                 var feeds_found = 0;
 463
 464                 var elems = reply.getElementsByTagName("counter");
 465
 466                 for (var l = 0; l < elems.length; l++) {
 467
 468                         var id = elems[l].getAttribute("id");
 469                         var t = elems[l].getAttribute("type");
 470                         var ctr = elems[l].getAttribute("counter");
 471                         var error = elems[l].getAttribute("error");
 472                         var has_img = elems[l].getAttribute("hi");
 473                         var updated = elems[l].getAttribute("updated");
 474                         var title = elems[l].getAttribute("title");
 475
 476                         if (id == "global-unread") {
 477                                 global_unread = ctr;
 478                                 updateTitle();
 479                                 continue;
 480                         }
 481
 482                         if (id == "subscribed-feeds") {
 483                                 feeds_found = ctr;
 484                                 continue;
 485                         }
 486
 487                         if (t == "category") {
 488                                 var catctr = document.getElementById("FCATCTR-" + id);
 489                                 if (catctr) {
 490                                         catctr.innerHTML = "(" + ctr + ")";
 491                                         if (ctr > 0) {
 492                                                 catctr.className = "catCtrHasUnread";
 493                                         } else {
 494                                                 catctr.className = "catCtrNoUnread";
 495                                         }
 496                                 }
 497                                 continue;
 498                         }
 499
 500                         var feedctr = document.getElementById("FEEDCTR-" + id);
 501                         var feedu = document.getElementById("FEEDU-" + id);
 502                         var feedr = document.getElementById("FEEDR-" + id);
 503                         var feed_img = document.getElementById("FIMG-" + id);
 504                         var feedlink = document.getElementById("FEEDL-" + id);
 505                         var feedupd = document.getElementById("FLUPD-" + id);
 506
 507                         if (updated && feedlink) {
 508                                 if (error) {
 509                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 510                                 } else {
 511                                         feedlink.title = "Updated: " + updated;
 512                                 }
 513                         }
 514
 515                         if (updated && feedupd) {
 516                                 if (error) {
 517                                         feedupd.innerHTML = updated + " (Error)";
 518                                 } else {
 519                                         feedupd.innerHTML = updated;
 520                                 }
 521                         }
 522
 523                         if (has_img && feed_img && !is_msie()) {
 524                                 if (!feed_img.src.match(id + ".ico")) {
 525                                         feed_img.src = getInitParam("icons_location") + "/" + id + ".ico";
 526                                 }
 527                         }
 528
 529                         if (feedlink && title) {
 530                                 feedlink.innerHTML = title;
 531                         }
 532
 533                         if (feedctr && feedu && feedr) {
 534
 535                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 536                                         viewCurrentFeed();
 537                                 }
 538
 539                                 var row_needs_hl = (ctr > 0 && ctr > parseInt(feedu.innerHTML));
 540
 541                                 feedu.innerHTML = ctr;
 542
 543                                 if (error) {
 544                                         feedr.className = feedr.className.replace("feed", "error");
 545                                 } else if (id > 0) {
 546                                         feedr.className = feedr.className.replace("error", "feed");
 547                                 }
 548
 549                                 if (ctr > 0) {
 550                                         feedctr.className = "odd";
 551                                         if (!feedr.className.match("Unread")) {
 552                                                 var is_selected = feedr.className.match("Selected");
 553
 554                                                 feedr.className = feedr.className.replace("Selected", "");
 555                                                 feedr.className = feedr.className.replace("Unread", "");
 556
 557                                                 feedr.className = feedr.className + "Unread";
 558
 559                                                 if (is_selected) {
 560                                                         feedr.className = feedr.className + "Selected";
 561                                                 }
 562
 563                                         }
 564
 565                                         if (row_needs_hl) {
 566                                                 new Effect.Highlight(feedr, {duration: 1, startcolor: "#fff7d5",
 567                                                         queue: { position:'end', scope: 'EFQ-' + id, limit: 1 } } );
 568                                         }
 569                                 } else {
 570                                         feedctr.className = "invisible";
 571                                         feedr.className = feedr.className.replace("Unread", "");
 572                                 }
 573                         }
 574                 }
 575
 576                 hideOrShowFeeds(document, getInitParam("hide_read_feeds") == 1);
 577
 578                 var feeds_stored = number_of_feeds;
 579
 580                 debug("Feed counters, C: " + feeds_found + ", S:" + feeds_stored);
 581
 582                 if (feeds_stored != feeds_found) {
 583                         number_of_feeds = feeds_found;
 584
 585                         if (feeds_stored != 0 && feeds_found != 0) {
 586                                 debug("Subscribed feed number changed, refreshing feedlist");
 587                                 setTimeout('updateFeedList(false, false)', 50);
 588                         }
 589                 }
 590
 591         } catch (e) {
 592                 exception_error("parse_counters", e);
 593         }
 594 }
 595
 596 function parse_counters_reply(transport, scheduled_call) {
 597
 598         if (!transport.responseXML) {
 599                 notify_error("Backend did not return valid XML", true);
 600                 return;
 601         }
 602
 603         var reply = transport.responseXML.firstChild;
 604
 605         if (!reply) {
 606                 notify_error("Backend did not return expected XML object", true);
 607                 updateTitle("");
 608                 return;
 609         }
 610
 611         var error_code = false;
 612         var error_msg = false;
 613
 614         if (reply.firstChild) {
 615                 error_code = reply.firstChild.getAttribute("error-code");
 616                 error_msg = reply.firstChild.getAttribute("error-msg");
 617         }
 618
 619         if (!error_code) {
 620                 error_code = reply.getAttribute("error-code");
 621                 error_msg = reply.getAttribute("error-msg");
 622         }
 623
 624         if (error_code && error_code != 0) {
 625                 debug("refetch_callback: got error code " + error_code);
 626                 return fatalError(error_code, error_msg);
 627         }
 628
 629         var counters = reply.getElementsByTagName("counters")[0];
 630
 631         parse_counters(counters, scheduled_call);
 632
 633         var runtime_info = reply.getElementsByTagName("runtime-info")[0];
 634
 635         parse_runtime_info(runtime_info);
 636
 637         if (getInitParam("feeds_sort_by_unread") == 1) {
 638                         resort_feedlist();
 639         }
 640
 641         hideOrShowFeeds(document, getInitParam("hide_read_feeds") == 1);
 642
 643 }
 644
 645 function all_counters_callback2(transport) {
 646         try {
 647                 debug("<b>all_counters_callback2 IN: " + transport + "</b>");
 648                 parse_counters_reply(transport);
 649                 debug("<b>all_counters_callback2 OUT: " + transport + "</b>");
 650
 651         } catch (e) {
 652                 exception_error("all_counters_callback2", e);
 653         }
 654 }
 655
 656 function get_feed_unread(id) {
 657         try {
 658                 return parseInt(document.getElementById("FEEDU-" + id).innerHTML);
 659         } catch (e) {
 660                 exception_error("get_feed_unread", e, true);
 661                 return -1;
 662         }
 663 }
 664
 665 function get_feed_entry_unread(doc, elem) {
 666
 667         var id = elem.id.replace("FEEDR-", "");
 668
 669         if (id <= 0) {
 670                 return -1;
 671         }
 672
 673         try {
 674                 return parseInt(doc.getElementById("FEEDU-" + id).innerHTML);
 675         } catch (e) {
 676                 return -1;
 677         }
 678 }
 679
 680 function resort_category(doc, node) {
 681         debug("resort_category: " + node);
 682
 683         if (node.hasChildNodes() && node.firstChild.nextSibling != false) {
 684                 for (i = 0; i < node.childNodes.length; i++) {
 685                         if (node.childNodes[i].nodeName != "LI") { continue; }
 686
 687                         if (get_feed_entry_unread(doc, node.childNodes[i]) < 0) {
 688                                 continue;
 689                         }
 690
 691                         for (j = i+1; j < node.childNodes.length; j++) {
 692                                 if (node.childNodes[j].nodeName != "LI") { continue; }
 693
 694                                 var tmp_val = get_feed_entry_unread(doc, node.childNodes[i]);
 695                                 var cur_val = get_feed_entry_unread(doc, node.childNodes[j]);
 696
 697                                 if (cur_val > tmp_val) {
 698                                         tempnode_i = node.childNodes[i].cloneNode(true);
 699                                         tempnode_j = node.childNodes[j].cloneNode(true);
 700                                         node.replaceChild(tempnode_i, node.childNodes[j]);
 701                                         node.replaceChild(tempnode_j, node.childNodes[i]);
 702                                 }
 703                         }
 704
 705                 }
 706         }
 707
 708 }
 709
 710 function resort_feedlist() {
 711         debug("resort_feedlist");
 712
 713         var fd = document;
 714
 715         if (fd.getElementById("feedCatHolder")) {
 716
 717                 var feeds = fd.getElementById("feedList");
 718                 var child = feeds.firstChild;
 719
 720                 while (child) {
 721
 722                         if (child.id == "feedCatHolder") {
 723                                 resort_category(fd, child.firstChild);
 724                         }
 725
 726                         child = child.nextSibling;
 727                 }
 728
 729         } else {
 730                 resort_category(fd, fd.getElementById("feedList"));
 731         }
 732 }
 733
 734 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 735   * * @author Sundar Dorai-Raj
 736   * * Email: sdoraira@vt.edu
 737   * * This program is free software; you can redistribute it and/or
 738   * * modify it under the terms of the GNU General Public License
 739   * * as published by the Free Software Foundation; either version 2
 740   * * of the License, or (at your option) any later version,
 741   * * provided that any use properly credits the author.
 742   * * This program is distributed in the hope that it will be useful,
 743   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 744   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 745   * * GNU General Public License for more details at http://www.gnu.org * * */
 746
 747   var numbers=".0123456789";
 748   function isNumeric(x) {
 749     // is x a String or a character?
 750     if(x.length>1) {
 751       // remove negative sign
 752       x=Math.abs(x)+"";
 753       for(j=0;j<x.length;j++) {
 754         // call isNumeric recursively for each character
 755         number=isNumeric(x.substring(j,j+1));
 756         if(!number) return number;
 757       }
 758       return number;
 759     }
 760     else {
 761       // if x is number return true
 762       if(numbers.indexOf(x)>=0) return true;
 763       return false;
 764     }
 765   }
 766
 767
 768 function hideOrShowFeeds(doc, hide) {
 769
 770         debug("hideOrShowFeeds: " + doc + ", " + hide);
 771
 772         var fd = document;
 773
 774         var list = fd.getElementById("feedList");
 775
 776         if (fd.getElementById("feedCatHolder")) {
 777
 778                 var feeds = fd.getElementById("feedList");
 779                 var child = feeds.firstChild;
 780
 781                 while (child) {
 782
 783                         if (child.id == "feedCatHolder") {
 784                                 hideOrShowFeedsCategory(fd, child.firstChild, hide, child.previousSibling);
 785                         }
 786
 787                         child = child.nextSibling;
 788                 }
 789
 790         } else {
 791                 hideOrShowFeedsCategory(fd, fd.getElementById("feedList"), hide);
 792         }
 793 }
 794
 795 function hideOrShowFeedsCategory(doc, node, hide, cat_node) {
 796
 797 //      debug("hideOrShowFeedsCategory: " + node + " (" + hide + ")");
 798
 799         var cat_unread = 0;
 800
 801         if (!node) {
 802                 debug("hideOrShowFeeds: passed node is null, aborting");
 803                 return;
 804         }
 805
 806 //      debug("cat: " + node.id);
 807
 808         if (node.hasChildNodes() && node.firstChild.nextSibling != false) {
 809                 for (i = 0; i < node.childNodes.length; i++) {
 810                         if (node.childNodes[i].nodeName != "LI") { continue; }
 811
 812                         if (node.childNodes[i].style != undefined) {
 813
 814                                 var has_unread = (node.childNodes[i].className != "feed" &&
 815                                         node.childNodes[i].className != "label" &&
 816                                         !(!getInitParam("hide_read_shows_special") &&
 817                                                 node.childNodes[i].className == "virt") &&
 818                                         node.childNodes[i].className != "error" &&
 819                                         node.childNodes[i].className != "tag");
 820
 821 //                              debug(node.childNodes[i].id + " --> " + has_unread);
 822
 823                                 if (hide && !has_unread) {
 824                                         //node.childNodes[i].style.display = "none";
 825                                         var id = node.childNodes[i].id;
 826                                         Effect.Fade(node.childNodes[i], {duration : 0.3,
 827                                                 queue: { position: 'end', scope: 'FFADE-' + id, limit: 1 }});
 828                                 }
 829
 830                                 if (!hide) {
 831                                         node.childNodes[i].style.display = "list-item";
 832                                         //Effect.Appear(node.childNodes[i], {duration : 0.3});
 833                                 }
 834
 835                                 if (has_unread) {
 836                                         node.childNodes[i].style.display = "list-item";
 837                                         cat_unread++;
 838                                         //Effect.Appear(node.childNodes[i], {duration : 0.3});
 839                                         //Effect.Highlight(node.childNodes[i]);
 840                                 }
 841                         }
 842                 }
 843         }
 844
 845 //      debug("end cat: " + node.id + " unread " + cat_unread);
 846
 847         if (cat_unread == 0) {
 848                 if (cat_node.style == undefined) {
 849                         debug("ERROR: supplied cat_node " + cat_node +
 850                                 " has no styles. WTF?");
 851                         return;
 852                 }
 853                 if (hide) {
 854                         //cat_node.style.display = "none";
 855                         Effect.Fade(cat_node, {duration : 0.3,
 856                                 queue: { position: 'end', scope: 'CFADE-' + node.id, limit: 1 }});
 857                 } else {
 858                         cat_node.style.display = "list-item";
 859                 }
 860         } else {
 861                 try {
 862                         cat_node.style.display = "list-item";
 863                 } catch (e) {
 864                         debug(e);
 865                 }
 866         }
 867
 868 //      debug("unread for category: " + cat_unread);
 869 }
 870
 871 function selectTableRow(r, do_select) {
 872         r.className = r.className.replace("Selected", "");
 873
 874         if (do_select) {
 875                 r.className = r.className + "Selected";
 876         }
 877 }
 878
 879 function selectTableRowById(elem_id, check_id, do_select) {
 880
 881         try {
 882
 883                 var row = document.getElementById(elem_id);
 884
 885                 if (row) {
 886                         selectTableRow(row, do_select);
 887                 }
 888
 889                 var check = document.getElementById(check_id);
 890
 891                 if (check) {
 892                         check.checked = do_select;
 893                 }
 894         } catch (e) {
 895                 exception_error("selectTableRowById", e);
 896         }
 897 }
 898
 899 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 900         classcheck, reset_others) {
 901
 902         var content = document.getElementById(content_id);
 903
 904         if (!content) {
 905                 alert("[selectTableRows] Element " + content_id + " not found.");
 906                 return;
 907         }
 908
 909         for (i = 0; i < content.rows.length; i++) {
 910                 if (Element.visible(content.rows[i])) {
 911                         if (!classcheck || content.rows[i].className.match(classcheck)) {
 912
 913                                 if (content.rows[i].id.match(prefix)) {
 914                                         selectTableRow(content.rows[i], do_select);
 915
 916                                         var row_id = content.rows[i].id.replace(prefix, "");
 917                                         var check = document.getElementById(check_prefix + row_id);
 918
 919                                         if (check) {
 920                                                 check.checked = do_select;
 921                                         }
 922                                 } else if (reset_others) {
 923                                         selectTableRow(content.rows[i], false);
 924
 925                                         var row_id = content.rows[i].id.replace(prefix, "");
 926                                         var check = document.getElementById(check_prefix + row_id);
 927
 928                                         if (check) {
 929                                                 check.checked = false;
 930                                         }
 931
 932                                 }
 933                         } else if (reset_others) {
 934                                 selectTableRow(content.rows[i], false);
 935
 936                                 var row_id = content.rows[i].id.replace(prefix, "");
 937                                 var check = document.getElementById(check_prefix + row_id);
 938
 939                                 if (check) {
 940                                         check.checked = false;
 941                                 }
 942
 943                         }
 944                 }
 945         }
 946 }
 947
 948 function getSelectedTableRowIds(content_id, prefix) {
 949
 950         var content = document.getElementById(content_id);
 951
 952         if (!content) {
 953                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 954                 return;
 955         }
 956
 957         var sel_rows = new Array();
 958
 959         for (i = 0; i < content.rows.length; i++) {
 960                 if (content.rows[i].id.match(prefix) &&
 961                                 content.rows[i].className.match("Selected")) {
 962
 963                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 964                         sel_rows.push(row_id);
 965                 }
 966         }
 967
 968         return sel_rows;
 969
 970 }
 971
 972 function toggleSelectRowById(sender, id) {
 973         var row = document.getElementById(id);
 974
 975         if (sender.checked) {
 976                 if (!row.className.match("Selected")) {
 977                         row.className = row.className + "Selected";
 978                 }
 979         } else {
 980                 if (row.className.match("Selected")) {
 981                         row.className = row.className.replace("Selected", "");
 982                 }
 983         }
 984 }
 985
 986 function toggleSelectListRow(sender) {
 987         var parent_row = sender.parentNode;
 988
 989         if (sender.checked) {
 990                 if (!parent_row.className.match("Selected")) {
 991                         parent_row.className = parent_row.className + "Selected";
 992                 }
 993         } else {
 994                 if (parent_row.className.match("Selected")) {
 995                         parent_row.className = parent_row.className.replace("Selected", "");
 996                 }
 997         }
 998 }
 999
1000 function tSR(sender) {
1001         return toggleSelectRow(sender);
1002 }
1003
1004 function toggleSelectRow(sender) {
1005         var parent_row = sender.parentNode.parentNode;
1006
1007         if (sender.checked) {
1008                 if (!parent_row.className.match("Selected")) {
1009                         parent_row.className = parent_row.className + "Selected";
1010                 }
1011         } else {
1012                 if (parent_row.className.match("Selected")) {
1013                         parent_row.className = parent_row.className.replace("Selected", "");
1014                 }
1015         }
1016 }
1017
1018 function getRelativeFeedId(list, id, direction, unread_only) {
1019         var rows = list.getElementsByTagName("LI");
1020         var feeds = new Array();
1021
1022         for (var i = 0; i < rows.length; i++) {
1023                 if (rows[i].id.match("FEEDR-")) {
1024
1025                         if (rows[i].id == "FEEDR-" + id || (Element.visible(rows[i]) && Element.visible(rows[i].parentNode))) {
1026
1027                                 if (!unread_only ||
1028                                                 (rows[i].className.match("Unread") || rows[i].id == "FEEDR-" + id)) {
1029                                         feeds.push(rows[i].id.replace("FEEDR-", ""));
1030                                 }
1031                         }
1032                 }
1033         }
1034
1035         if (!id) {
1036                 if (direction == "next") {
1037                         return feeds.shift();
1038                 } else {
1039                         return feeds.pop();
1040                 }
1041         } else {
1042                 if (direction == "next") {
1043                         var idx = feeds.indexOf(id);
1044                         if (idx != -1 && idx < feeds.length) {
1045                                 return feeds[idx+1];
1046                         } else {
1047                                 return getRelativeFeedId(list, false, direction, unread_only);
1048                         }
1049                 } else {
1050                         var idx = feeds.indexOf(id);
1051                         if (idx > 0) {
1052                                 return feeds[idx-1];
1053                         } else {
1054                                 return getRelativeFeedId(list, false, direction, unread_only);
1055                         }
1056                 }
1057
1058         }
1059 }
1060
1061 function showBlockElement(id, h_id) {
1062         var elem = document.getElementById(id);
1063
1064         if (elem) {
1065                 elem.style.display = "block";
1066
1067                 if (h_id) {
1068                         elem = document.getElementById(h_id);
1069                         if (elem) {
1070                                 elem.style.display = "none";
1071                         }
1072                 }
1073         } else {
1074                 alert("[showBlockElement] can't find element with id " + id);
1075         }
1076 }
1077
1078 function appearBlockElement_afh(effect) {
1079
1080 }
1081
1082 function checkboxToggleElement(elem, id) {
1083         if (elem.checked) {
1084                 Effect.SlideDown(id, {duration : 0.5});
1085         } else {
1086                 Effect.SlideUp(id, {duration : 0.5});
1087         }
1088 }
1089
1090 function appearBlockElement(id, h_id) {
1091
1092         try {
1093                 if (h_id) {
1094                         Effect.Fade(h_id);
1095                 }
1096                 Effect.SlideDown(id, {duration : 1.0, afterFinish: appearBlockElement_afh});
1097         } catch (e) {
1098                 exception_error("appearBlockElement", e);
1099         }
1100
1101 }
1102
1103 function hideParentElement(e) {
1104         e.parentNode.style.display = "none";
1105 }
1106
1107 function dropboxSelect(e, v) {
1108         for (i = 0; i < e.length; i++) {
1109                 if (e[i].value == v) {
1110                         e.selectedIndex = i;
1111                         break;
1112                 }
1113         }
1114 }
1115
1116 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
1117 // bugfixed just a little bit :-)
1118 function getURLParam(strParamName){
1119   var strReturn = "";
1120   var strHref = window.location.href;
1121
1122   if (strHref.indexOf("#") == strHref.length-1) {
1123                 strHref = strHref.substring(0, strHref.length-1);
1124   }
1125
1126   if ( strHref.indexOf("?") > -1 ){
1127     var strQueryString = strHref.substr(strHref.indexOf("?"));
1128     var aQueryString = strQueryString.split("&");
1129     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
1130       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
1131         var aParam = aQueryString[iParam].split("=");
1132         strReturn = aParam[1];
1133         break;
1134       }
1135     }
1136   }
1137   return strReturn;
1138 }
1139
1140 function leading_zero(p) {
1141         var s = String(p);
1142         if (s.length == 1) s = "0" + s;
1143         return s;
1144 }
1145
1146 function closeInfoBox(cleanup) {
1147
1148         if (!is_msie() && !getInitParam("infobox_disable_overlay")) {
1149                 var overlay = document.getElementById("dialog_overlay");
1150                 if (overlay) {
1151                         overlay.style.display = "none";
1152                 }
1153         }
1154
1155         var box = document.getElementById('infoBox');
1156         var shadow = document.getElementById('infoBoxShadow');
1157
1158         if (shadow) {
1159                 shadow.style.display = "none";
1160         } else if (box) {
1161                 box.style.display = "none";
1162         }
1163
1164         if (cleanup) box.innerHTML = "&nbsp;";
1165
1166         enableHotkeys();
1167
1168         return false;
1169 }
1170
1171
1172 function displayDlg(id, param) {
1173
1174         notify_progress("Loading, please wait...", true);
1175
1176         disableHotkeys();
1177
1178         var query = "backend.php?op=dlg&id=" +
1179                 param_escape(id) + "&param=" + param_escape(param);
1180
1181         new Ajax.Request(query, {
1182                 onComplete: function (transport) {
1183                         infobox_callback2(transport);
1184                 } });
1185
1186         return false;
1187 }
1188
1189 function infobox_submit_callback2(transport) {
1190         closeInfoBox();
1191
1192         try {
1193                 // called from prefs, reload tab
1194                 if (active_tab) {
1195                         selectTab(active_tab, false);
1196                 }
1197         } catch (e) { }
1198
1199         if (transport.responseText) {
1200                 notify_info(transport.responseText);
1201         }
1202 }
1203
1204 function infobox_callback2(transport) {
1205         try {
1206
1207                 debug("infobox_callback2");
1208
1209                 if (!is_msie() && !getInitParam("infobox_disable_overlay")) {
1210                         var overlay = document.getElementById("dialog_overlay");
1211                         if (overlay) {
1212                                 overlay.style.display = "block";
1213                         }
1214                 }
1215
1216                 var box = document.getElementById('infoBox');
1217                 var shadow = document.getElementById('infoBoxShadow');
1218                 if (box) {
1219
1220 /*                              if (!is_safari()) {
1221                                 new Draggable(shadow);
1222                         } */
1223
1224                         box.innerHTML=transport.responseText;
1225                         if (shadow) {
1226                                 shadow.style.display = "block";
1227                         } else {
1228                                 box.style.display = "block";
1229                         }
1230                 }
1231
1232                 /* FIXME this needs to be moved out somewhere */
1233
1234                 if (document.getElementById("tags_choices")) {
1235                         new Ajax.Autocompleter('tags_str', 'tags_choices',
1236                                 "backend.php?op=rpc&subop=completeTags",
1237                                 { tokens: ',', paramName: "search" });
1238                 }
1239
1240                 disableHotkeys();
1241
1242                 notify("");
1243         } catch (e) {
1244                 exception_error("infobox_callback2", e);
1245         }
1246 }
1247
1248 function createFilter() {
1249
1250         var form = document.forms['filter_add_form'];
1251         var reg_exp = form.reg_exp.value;
1252
1253         if (reg_exp == "") {
1254                 alert(__("Can't add filter: nothing to match on."));
1255                 return false;
1256         }
1257
1258         var query = Form.serialize("filter_add_form");
1259
1260         // we can be called from some other tab in Prefs
1261         if (active_tab) active_tab = "filterConfig";
1262
1263         new Ajax.Request("backend.php?" + query, {
1264                 onComplete: function (transport) {
1265                         infobox_submit_callback2(transport);
1266                 } });
1267
1268         return true;
1269 }
1270
1271 function toggleSubmitNotEmpty(e, submit_id) {
1272         try {
1273                 document.getElementById(submit_id).disabled = (e.value == "")
1274         } catch (e) {
1275                 exception_error("toggleSubmitNotEmpty", e);
1276         }
1277 }
1278
1279 function isValidURL(s) {
1280         return s.match("http://") != null || s.match("https://") != null || s.match("feed://") != null;
1281 }
1282
1283 function subscribeToFeed() {
1284
1285         var form = document.forms['feed_add_form'];
1286         var feed_url = form.feed_url.value;
1287
1288         if (feed_url == "") {
1289                 alert(__("Can't subscribe: no feed URL given."));
1290                 return false;
1291         }
1292
1293         notify_progress(__("Subscribing to feed..."), true);
1294
1295         closeInfoBox();
1296
1297         var feeds_doc = document;
1298
1299 //      feeds_doc.location.href = "backend.php?op=error&msg=Loading,%20please wait...";
1300
1301         var query = Form.serialize("feed_add_form");
1302
1303         debug("subscribe q: " + query);
1304
1305         new Ajax.Request("backend.php", {
1306                 parameters: query,
1307                 onComplete: function(transport) {
1308                         dlg_frefresh_callback(transport);
1309                 } });
1310
1311         return false;
1312 }
1313
1314 function filterCR(e, f)
1315 {
1316      var key;
1317
1318      if(window.event)
1319           key = window.event.keyCode;     //IE
1320      else
1321           key = e.which;     //firefox
1322
1323         if (key == 13) {
1324                 if (typeof f != 'undefined') {
1325                         f();
1326                         return false;
1327                 } else {
1328                         return false;
1329                 }
1330         } else {
1331                 return true;
1332         }
1333 }
1334
1335 function getMainContext() {
1336         return this.window;
1337 }
1338
1339 function getFeedsContext() {
1340         return this.window;
1341 }
1342
1343 function getContentContext() {
1344         return this.window;
1345 }
1346
1347 function getHeadlinesContext() {
1348         return this.window;
1349 }
1350
1351 var debug_last_class = "even";
1352
1353 function debug(msg) {
1354
1355         if (debug_last_class == "even") {
1356                 debug_last_class = "odd";
1357         } else {
1358                 debug_last_class = "even";
1359         }
1360
1361         var c = document.getElementById('debug_output');
1362         if (c && c.style.display == "block") {
1363                 while (c.lastChild != 'undefined' && c.childNodes.length > 100) {
1364                         c.removeChild(c.lastChild);
1365                 }
1366
1367                 var d = new Date();
1368                 var ts = leading_zero(d.getHours()) + ":" + leading_zero(d.getMinutes()) +
1369                         ":" + leading_zero(d.getSeconds());
1370                 c.innerHTML = "<li class=\"" + debug_last_class + "\"><span class=\"debugTS\">[" + ts + "]</span> " +
1371                         msg + "</li>" + c.innerHTML;
1372         }
1373 }
1374
1375 function getInitParam(key) {
1376         return init_params[key];
1377 }
1378
1379 function storeInitParam(key, value) {
1380         debug("<b>storeInitParam is OBSOLETE: " + key + " => " + value + "</b>");
1381         init_params[key] = value;
1382 }
1383
1384 function fatalError(code, message) {
1385         try {
1386
1387                 if (code == 6) {
1388                         window.location.href = "tt-rss.php";
1389                 } else if (code == 5) {
1390                         window.location.href = "update.php";
1391                 } else {
1392                         var fe = document.getElementById("fatal_error");
1393                         var fc = document.getElementById("fatal_error_msg");
1394
1395                         if (message == "") message = "Unknown error";
1396
1397                         fc.innerHTML = "<img src='images/sign_excl.gif'> " + message + " (Code " + code + ")";
1398
1399                         fe.style.display = "block";
1400                 }
1401
1402         } catch (e) {
1403                 exception_error("fatalError", e);
1404         }
1405 }
1406
1407 function getFeedName(id, is_cat) {
1408         var d = getFeedsContext().document;
1409
1410         var e;
1411
1412         if (is_cat) {
1413                 e = d.getElementById("FCATN-" + id);
1414         } else {
1415                 e = d.getElementById("FEEDN-" + id);
1416         }
1417         if (e) {
1418                 return e.innerHTML.stripTags();
1419         } else {
1420                 return null;
1421         }
1422 }
1423
1424 function viewContentUrl(url) {
1425         getContentContext().location = url;
1426 }
1427
1428 function filterDlgCheckAction(sender) {
1429
1430         try {
1431
1432                 var action = sender[sender.selectedIndex].value;
1433
1434                 var form = document.forms["filter_add_form"];
1435
1436                 if (!form) {
1437                         form = document.forms["filter_edit_form"];
1438                 }
1439
1440                 if (!form) {
1441                         debug("filterDlgCheckAction: can't find form!");
1442                         return;
1443                 }
1444
1445                 var action_param = form.action_param;
1446
1447                 if (!action_param) {
1448                         debug("filterDlgCheckAction: can't find action param!");
1449                         return;
1450                 }
1451
1452                 // if selected action supports parameters, enable params field
1453                 if (action == 4 || action == 6) {
1454                         action_param.disabled = false;
1455                 } else {
1456                         action_param.disabled = true;
1457                 }
1458
1459         } catch (e) {
1460                 exception_error(e, "filterDlgCheckAction");
1461         }
1462
1463 }
1464
1465 function explainError(code) {
1466         return displayDlg("explainError", code);
1467 }
1468
1469 // this only searches loaded headlines list, not in CDM
1470 function getRelativePostIds(id) {
1471
1472         debug("getRelativePostIds: " + id);
1473
1474         var ids = new Array();
1475         var container = document.getElementById("headlinesList");
1476
1477         if (container) {
1478                 var rows = container.rows;
1479
1480                 for (var i = 0; i < rows.length; i++) {
1481                         var r_id = rows[i].id.replace("RROW-", "");
1482
1483                         if (r_id == id) {
1484                                 if (i > 0) ids.push(rows[i-1].id.replace("RROW-", ""));
1485                                 if (i > 1) ids.push(rows[i-2].id.replace("RROW-", ""));
1486                                 if (i > 2) ids.push(rows[i-3].id.replace("RROW-", ""));
1487
1488                                 if (i < rows.length-1) ids.push(rows[i+1].id.replace("RROW-", ""));
1489                                 if (i < rows.length-2) ids.push(rows[i+2].id.replace("RROW-", ""));
1490                                 if (i < rows.length-3) ids.push(rows[i+3].id.replace("RROW-", ""));
1491
1492                                 return ids;
1493                         }
1494                 }
1495         }
1496
1497         return false;
1498 }
1499
1500 function openArticleInNewWindow(id) {
1501         try {
1502                 debug("openArticleInNewWindow: " + id);
1503
1504                 var query = "backend.php?op=rpc&subop=getArticleLink&id=" + id;
1505
1506                 debug(query);
1507
1508                 new Ajax.Request(query, {
1509                         onComplete: function(transport) {
1510                                 open_article_callback(transport);
1511                         } });
1512
1513
1514         } catch (e) {
1515                 exception_error("openArticleInNewWindow", e);
1516         }
1517 }
1518
1519 /* http://textsnippets.com/posts/show/835 */
1520
1521 Position.GetWindowSize = function(w) {
1522         w = w ? w : window;
1523         var width = w.innerWidth || (w.document.documentElement.clientWidth || w.document.body.clientWidth);
1524         var height = w.innerHeight || (w.document.documentElement.clientHeight || w.document.body.clientHeight);
1525         return [width, height]
1526 }
1527
1528 /* http://textsnippets.com/posts/show/836 */
1529
1530 Position.Center = function(element, parent) {
1531         var w, h, pw, ph;
1532         var d = Element.getDimensions(element);
1533         w = d.width;
1534         h = d.height;
1535         Position.prepare();
1536         if (!parent) {
1537                 var ws = Position.GetWindowSize();
1538                 pw = ws[0];
1539                 ph = ws[1];
1540         } else {
1541                 pw = parent.offsetWidth;
1542                 ph = parent.offsetHeight;
1543         }
1544         element.style.top = (ph/2) - (h/2) -  Position.deltaY + "px";
1545         element.style.left = (pw/2) - (w/2) -  Position.deltaX + "px";
1546 }
1547
1548
1549 function labeltest_callback(transport) {
1550         try {
1551                 var container = document.getElementById('label_test_result');
1552
1553                 container.innerHTML = transport.responseText;
1554                 if (!Element.visible(container)) {
1555                         Effect.SlideDown(container, { duration : 0.5 });
1556                 }
1557
1558                 notify("");
1559         } catch (e) {
1560                 exception_error("labeltest_callback", e);
1561         }
1562 }
1563
1564 function labelTest() {
1565
1566         try {
1567                 var container = document.getElementById('label_test_result');
1568
1569                 var form = document.forms['label_edit_form'];
1570
1571                 var sql_exp = form.sql_exp.value;
1572                 var description = form.description.value;
1573
1574                 notify_progress("Loading, please wait...");
1575
1576                 var query = "backend.php?op=pref-labels&subop=test&expr=" +
1577                         param_escape(sql_exp) + "&descr=" + param_escape(description);
1578
1579                 new Ajax.Request(query, {
1580                         onComplete: function (transport) {
1581                                 labeltest_callback(transport);
1582                         } });
1583
1584                 return false;
1585
1586         } catch (e) {
1587                 exception_error("labelTest", e);
1588         }
1589 }
1590
1591 function isCdmMode() {
1592         return !document.getElementById("headlinesList");
1593 }
1594
1595 function getSelectedArticleIds2() {
1596         var rows = new Array();
1597         var cdm_mode = isCdmMode();
1598
1599         if (cdm_mode) {
1600                 rows = cdmGetSelectedArticles();
1601         } else {
1602                 rows = getSelectedTableRowIds("headlinesList", "RROW", "RCHK");
1603         }
1604
1605         var ids = new Array();
1606
1607         for (var i = 0; i < rows.length; i++) {
1608                 var chk = document.getElementById("RCHK-" + rows[i]);
1609                 if (chk && chk.checked) {
1610                         ids.push(rows[i]);
1611                 }
1612         }
1613
1614         return ids;
1615 }
1616
1617 function displayHelpInfobox(topic_id) {
1618
1619         var url = "backend.php?op=help&tid=" + param_escape(topic_id);
1620
1621         var w = window.open(url, "ttrss_help",
1622                 "status=0,toolbar=0,location=0,width=450,height=500,scrollbars=1,menubar=0");
1623
1624         return false;
1625 }
1626
1627 var _border_color_normal = "#88b0f0";
1628 var _border_color_highlight = "#72eda8";
1629 var _border_color_flash = "#f0fff0";
1630
1631 function highlightHotkeyZone(zone) {
1632         try {
1633                 var feeds = document.getElementById("feeds-holder");
1634                 var headlines = document.getElementById("headlines-frame");
1635                 var content = document.getElementById("content-frame");
1636
1637                 feeds.style.borderColor = _border_color_normal;
1638                 headlines.style.borderColor = _border_color_normal;
1639                 content.style.borderColor = _border_color_normal;
1640
1641                 if (zone == 1) {
1642                         feeds.style.borderColor = _border_color_highlight;
1643
1644                         new Effect.Highlight(feeds, {duration: 0.5, startcolor:
1645                                 _border_color_flash,
1646                                 queue: { position:'end', scope: 'EFCHL-Q', limit: 1 } } );
1647                 }
1648
1649                 if (zone == 2) {
1650                         headlines.style.borderColor = _border_color_highlight;
1651
1652                         new Effect.Highlight(headlines, {duration: 0.5, startcolor:
1653                                 _border_color_flash,
1654                                 queue: { position:'end', scope: 'EFCHL-Q', limit: 1 } } );
1655                 }
1656
1657                 if (zone == 3 && content) {
1658                         content.style.borderColor = _border_color_highlight;
1659
1660                         new Effect.Highlight(content, {duration: 0.5, startcolor:
1661                                 _border_color_flash,
1662                                 queue: { position:'end', scope: 'EFCHL-Q', limit: 1 } } );
1663                 }
1664
1665         } catch (e) {
1666                 exception_error("highlightHotkeyZone", e);
1667         }
1668 }
1669
1670
1671 function setHotkeyZone(zone) {
1672         try {
1673                 hotkey_zone = zone;
1674
1675                 highlightHotkeyZone(zone);
1676
1677
1678         } catch (e) {
1679                 exception_error("setHotkeyZone", e);
1680         }
1681 }
1682