functions.js

   1 var hotkeys_enabled = true;
   2
   3 function exception_error(location, e) {
   4         var msg;
   5
   6         if (e.fileName) {
   7                 var base_fname = e.fileName.substring(e.fileName.lastIndexOf("/") + 1);
   8
   9                 msg = "Exception: " + e.name + ", " + e.message +
  10                         "\nFunction: " + location + "()" +
  11                         "\nLocation: " + base_fname + ":" + e.lineNumber;
  12         } else {
  13                 msg = "Exception: " + e + "\nFunction: " + location + "()";
  14         }
  15
  16         alert(msg);
  17 }
  18
  19 function disableHotkeys() {
  20         hotkeys_enabled = false;
  21 }
  22
  23 function enableHotkeys() {
  24         hotkeys_enabled = true;
  25 }
  26
  27 function xmlhttp_ready(obj) {
  28         return obj.readyState == 4 || obj.readyState == 0 || !obj.readyState;
  29 }
  30
  31
  32 function notify_callback() {
  33         var container = document.getElementById('notify');
  34         if (xmlhttp.readyState == 4) {
  35                 container.innerHTML=xmlhttp.responseText;
  36         }
  37 }
  38
  39 function rpc_notify_callback() {
  40         var container = document.getElementById('notify');
  41         if (xmlhttp_rpc.readyState == 4) {
  42                 container.innerHTML=xmlhttp_rpc.responseText;
  43         }
  44 }
  45
  46 function rpc_pnotify_callback() {
  47         var container = parent.document.getElementById('notify');
  48         if (xmlhttp_rpc.readyState == 4) {
  49                 container.innerHTML=xmlhttp_rpc.responseText;
  50         }
  51 }
  52
  53 function param_escape(arg) {
  54         if (typeof encodeURIComponent != 'undefined')
  55                 return encodeURIComponent(arg);
  56         else
  57                 return escape(arg);
  58 }
  59
  60 function param_unescape(arg) {
  61         if (typeof decodeURIComponent != 'undefined')
  62                 return decodeURIComponent(arg);
  63         else
  64                 return unescape(arg);
  65 }
  66
  67 function delay(gap) {
  68         var then,now;
  69         then=new Date().getTime();
  70         now=then;
  71         while((now-then)<gap) {
  72                 now=new Date().getTime();
  73         }
  74 }
  75
  76 function p_notify(msg) {
  77
  78         var n = parent.document.getElementById("notify");
  79         var nb = parent.document.getElementById("notify_body");
  80
  81         if (!n || !nb) return;
  82
  83         if (msg == "") {
  84                 nb.innerHTML = "&nbsp;";
  85 //              n.style.background = "#ffffff";
  86         } else {
  87                 nb.innerHTML = msg;
  88 //              n.style.background = "#fffff0";
  89         }
  90 }
  91
  92 function notify(msg) {
  93
  94         var n = document.getElementById("notify");
  95         var nb = document.getElementById("notify_body");
  96
  97         if (!n || !nb) return;
  98
  99         if (msg == "") {
 100                 nb.innerHTML = "&nbsp;";
 101 //              n.style.background = "#ffffff";
 102         } else {
 103                 nb.innerHTML = msg;
 104 //              n.style.background = "#fffff0";
 105         }
 106
 107 }
 108
 109 function printLockingError() {
 110         notify("Please wait until operation finishes");}
 111
 112 var seq = "";
 113
 114 function hotkey_handler(e) {
 115
 116         var keycode;
 117
 118         if (!hotkeys_enabled) return;
 119
 120         if (window.event) {
 121                 keycode = window.event.keyCode;
 122         } else if (e) {
 123                 keycode = e.which;
 124         }
 125
 126         if (keycode == 13 || keycode == 27) {
 127                 seq = "";
 128         } else {
 129                 seq = seq + "" + keycode;
 130         }
 131
 132         if (document.getElementById("piggie")) {
 133
 134                 if (seq.match("807371717369")) {
 135                         seq = "";
 136                         localPiggieFunction(true);
 137                 } else {
 138                         localPiggieFunction(false);
 139                 }
 140         }
 141
 142         if (typeof localHotkeyHandler != 'undefined') {
 143                 try {
 144                         localHotkeyHandler(keycode);
 145                 } catch (e) {
 146                         exception_error("hotkey_handler", e);
 147                 }
 148         }
 149
 150 }
 151
 152 function cleanSelectedList(element) {
 153         var content = document.getElementById(element);
 154
 155         if (!document.getElementById("feedCatHolder")) {
 156                 for (i = 0; i < content.childNodes.length; i++) {
 157                         var child = content.childNodes[i];
 158                         try {
 159                                 child.className = child.className.replace("Selected", "");
 160                         } catch (e) {
 161                                 //
 162                         }
 163                 }
 164         } else {
 165                 for (i = 0; i < content.childNodes.length; i++) {
 166                         var child = content.childNodes[i];
 167
 168                         if (child.id == "feedCatHolder") {
 169                                 var fcat = child.lastChild;
 170                                 for (j = 0; j < fcat.childNodes.length; j++) {
 171                                         var feed = fcat.childNodes[j];
 172                                         feed.className = feed.className.replace("Selected", "");
 173                                 }
 174                         }
 175                 }
 176
 177         }
 178 }
 179
 180
 181 function cleanSelected(element) {
 182         var content = document.getElementById(element);
 183
 184         for (i = 0; i < content.rows.length; i++) {
 185                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 186         }
 187
 188 }
 189
 190 function getVisibleUnreadHeadlines() {
 191         var content = document.getElementById("headlinesList");
 192
 193         var rows = new Array();
 194
 195         for (i = 0; i < content.rows.length; i++) {
 196                 var row_id = content.rows[i].id.replace("RROW-", "");
 197                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 198                                 rows.push(row_id);
 199                 }
 200         }
 201         return rows;
 202 }
 203
 204 function getVisibleHeadlineIds() {
 205
 206         var content = document.getElementById("headlinesList");
 207
 208         var rows = new Array();
 209
 210         for (i = 0; i < content.rows.length; i++) {
 211                 var row_id = content.rows[i].id.replace("RROW-", "");
 212                 if (row_id.length > 0) {
 213                                 rows.push(row_id);
 214                 }
 215         }
 216         return rows;
 217 }
 218
 219 function getFirstVisibleHeadlineId() {
 220         var rows = getVisibleHeadlineIds();
 221         return rows[0];
 222 }
 223
 224 function getLastVisibleHeadlineId() {
 225         var rows = getVisibleHeadlineIds();
 226         return rows[rows.length-1];
 227 }
 228
 229 function markHeadline(id) {
 230         var row = document.getElementById("RROW-" + id);
 231         if (row) {
 232                 var is_active = false;
 233
 234                 if (row.className.match("Active")) {
 235                         is_active = true;
 236                 }
 237                 row.className = row.className.replace("Selected", "");
 238                 row.className = row.className.replace("Active", "");
 239                 row.className = row.className.replace("Insensitive", "");
 240
 241                 if (is_active) {
 242                         row.className = row.className = "Active";
 243                 }
 244
 245                 row.className = row.className + "Selected";
 246
 247         }
 248 }
 249
 250 function getFeedIds() {
 251         var content = document.getElementById("feedsList");
 252
 253         var rows = new Array();
 254
 255         for (i = 0; i < content.rows.length; i++) {
 256                 var id = content.rows[i].id.replace("FEEDR-", "");
 257                 if (id.length > 0) {
 258                         rows.push(id);
 259                 }
 260         }
 261
 262         return rows;
 263 }
 264
 265 function setCookie(name, value, expires, path, domain, secure) {
 266         document.cookie= name + "=" + escape(value) +
 267                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 268                 ((path) ? "; path=" + path : "") +
 269                 ((domain) ? "; domain=" + domain : "") +
 270                 ((secure) ? "; secure" : "");
 271 }
 272
 273 function getCookie(name) {
 274
 275         var dc = document.cookie;
 276         var prefix = name + "=";
 277         var begin = dc.indexOf("; " + prefix);
 278         if (begin == -1) {
 279             begin = dc.indexOf(prefix);
 280             if (begin != 0) return null;
 281         }
 282         else {
 283             begin += 2;
 284         }
 285         var end = document.cookie.indexOf(";", begin);
 286         if (end == -1) {
 287             end = dc.length;
 288         }
 289         return unescape(dc.substring(begin + prefix.length, end));
 290 }
 291
 292 function disableContainerChildren(id, disable, doc) {
 293
 294         if (!doc) doc = document;
 295
 296         var container = doc.getElementById(id);
 297
 298         for (var i = 0; i < container.childNodes.length; i++) {
 299                 var child = container.childNodes[i];
 300
 301                 try {
 302                         child.disabled = disable;
 303                 } catch (E) {
 304
 305                 }
 306
 307                 if (disable) {
 308                         if (child.className && child.className.match("button")) {
 309                                 child.className = "disabledButton";
 310                         }
 311                 } else {
 312                         if (child.className && child.className.match("disabledButton")) {
 313                                 child.className = "button";
 314                         }
 315                 }
 316         }
 317
 318 }
 319
 320 function gotoPreferences() {
 321         document.location.href = "prefs.php";
 322 }
 323
 324 function gotoMain() {
 325         document.location.href = "tt-rss.php";
 326 }
 327
 328 function gotoExportOpml() {
 329         document.location.href = "opml.php?op=Export";
 330 }
 331
 332 function getActiveFeedId() {
 333         return getCookie("ttrss_vf_actfeed");
 334 }
 335
 336 function setActiveFeedId(id) {
 337         return setCookie("ttrss_vf_actfeed", id);
 338 }
 339
 340 var xmlhttp_rpc = false;
 341
 342 /*@cc_on @*/
 343 /*@if (@_jscript_version >= 5)
 344 // JScript gives us Conditional compilation, we can cope with old IE versions.
 345 // and security blocked creation of the objects.
 346 try {
 347         xmlhttp_rpc = new ActiveXObject("Msxml2.XMLHTTP");
 348 } catch (e) {
 349         try {
 350                 xmlhttp_rpc = new ActiveXObject("Microsoft.XMLHTTP");
 351         } catch (E) {
 352                 xmlhttp_rpc = false;
 353         }
 354 }
 355 @end @*/
 356
 357 if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 358         xmlhttp_rpc = new XMLHttpRequest();
 359 }
 360
 361 function parse_counters(reply, f_document, title_obj) {
 362         try {
 363                 for (var l = 0; l < reply.childNodes.length; l++) {
 364                         if (!reply.childNodes[l] ||
 365                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 366                                 // where did this come from?
 367                                 continue;
 368                         }
 369
 370                         var id = reply.childNodes[l].getAttribute("id");
 371                         var t = reply.childNodes[l].getAttribute("type");
 372                         var ctr = reply.childNodes[l].getAttribute("counter");
 373                         var error = reply.childNodes[l].getAttribute("error");
 374                         var has_img = reply.childNodes[l].getAttribute("hi");
 375
 376                         if (id == "global-unread") {
 377                                 title_obj.global_unread = ctr;
 378                                 title_obj.updateTitle();
 379                                 continue;
 380                         }
 381
 382                         if (t == "category") {
 383                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 384                                 if (catctr) {
 385                                         catctr.innerHTML = "(" + ctr + " unread)";
 386                                 }
 387                                 continue;
 388                         }
 389
 390                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 391                         var feedu = f_document.getElementById("FEEDU-" + id);
 392                         var feedr = f_document.getElementById("FEEDR-" + id);
 393                         var feed_img = f_document.getElementById("FIMG-" + id);
 394
 395                         if (feedctr && feedu && feedr) {
 396
 397                                 feedu.innerHTML = ctr;
 398
 399                                 if (error) {
 400                                         feedr.className = feedr.className.replace("feed", "error");
 401                                 } else if (id > 0) {
 402                                         feedr.className = feedr.className.replace("error", "feed");
 403                                 }
 404
 405                                 if (ctr > 0) {
 406                                         feedctr.className = "odd";
 407                                         if (!feedr.className.match("Unread")) {
 408                                                 var is_selected = feedr.className.match("Selected");
 409
 410                                                 feedr.className = feedr.className.replace("Selected", "");
 411                                                 feedr.className = feedr.className.replace("Unread", "");
 412
 413                                                 feedr.className = feedr.className + "Unread";
 414
 415                                                 if (is_selected) {
 416                                                         feedr.className = feedr.className + "Selected";
 417                                                 }
 418
 419                                         }
 420                                 } else {
 421                                         feedctr.className = "invisible";
 422                                         feedr.className = feedr.className.replace("Unread", "");
 423                                 }
 424                         }
 425                 }
 426         } catch (e) {
 427                 exception_error("parse_counters", e);
 428         }
 429 }
 430
 431 // this one is called from feedlist context
 432 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 433
 434 function all_counters_callback() {
 435         if (xmlhttp_rpc.readyState == 4) {
 436                 try {
 437                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 438                                 notify("[all_counters_callback] backend did not return valid XML");
 439                                 return;
 440                         }
 441
 442                         var reply = xmlhttp_rpc.responseXML.firstChild;
 443                         var f_document = parent.frames["feeds-frame"].document;
 444
 445                         parse_counters(reply, f_document, parent);
 446
 447                 } catch (e) {
 448                         exception_error("all_counters_callback", e);
 449                 }
 450         }
 451 }
 452
 453 function update_all_counters(feed) {
 454         if (xmlhttp_ready(xmlhttp_rpc)) {
 455                 var query = "backend.php?op=rpc&subop=getAllCounters";
 456
 457                 if (feed > 0) {
 458                         query = query + "&aid=" + feed;
 459                 }
 460
 461                 xmlhttp_rpc.open("GET", query, true);
 462                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 463                 xmlhttp_rpc.send(null);
 464         }
 465 }
 466
 467 function popupHelp(tid) {
 468         var w = window.open("backend.php?op=help&tid=" + tid,
 469                 "Popup Help",
 470                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 471 }
 472
 473 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 474   * * @author Sundar Dorai-Raj
 475   * * Email: sdoraira@vt.edu
 476   * * This program is free software; you can redistribute it and/or
 477   * * modify it under the terms of the GNU General Public License
 478   * * as published by the Free Software Foundation; either version 2
 479   * * of the License, or (at your option) any later version,
 480   * * provided that any use properly credits the author.
 481   * * This program is distributed in the hope that it will be useful,
 482   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 483   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 484   * * GNU General Public License for more details at http://www.gnu.org * * */
 485
 486   var numbers=".0123456789";
 487   function isNumeric(x) {
 488     // is x a String or a character?
 489     if(x.length>1) {
 490       // remove negative sign
 491       x=Math.abs(x)+"";
 492       for(j=0;j<x.length;j++) {
 493         // call isNumeric recursively for each character
 494         number=isNumeric(x.substring(j,j+1));
 495         if(!number) return number;
 496       }
 497       return number;
 498     }
 499     else {
 500       // if x is number return true
 501       if(numbers.indexOf(x)>=0) return true;
 502       return false;
 503     }
 504   }
 505
 506
 507 function hideOrShowFeeds(doc, hide) {
 508
 509         if (!doc.styleSheets) return;
 510
 511         var css_rules = doc.styleSheets[0].cssRules;
 512
 513         if (!css_rules || !css_rules.length) return;
 514
 515         for (i = 0; i < css_rules.length; i++) {
 516                 var rule = css_rules[i];
 517
 518                 if (rule.selectorText == "ul.feedList li.feed") {
 519                         if (!hide) {
 520                                 rule.style.display = "block";
 521                         } else {
 522                                 rule.style.display = "none";
 523                         }
 524                 }
 525
 526         }
 527
 528 }
 529
 530 function fatalError(code, params) {
 531         if (!params) {
 532                 window.location = "error.php?c=" + param_escape(code);
 533         } else {
 534                 window.location = "error.php?c=" + param_escape(code) +
 535                         "&p=" + param_escape(params);
 536         }
 537 }
 538
 539 function selectTableRow(r, do_select) {
 540         r.className = r.className.replace("Selected", "");
 541
 542         if (do_select) {
 543                 r.className = r.className + "Selected";
 544         }
 545 }
 546
 547 function selectTableRowById(elem_id, check_id, do_select) {
 548
 549         try {
 550
 551                 var row = document.getElementById(elem_id);
 552
 553                 if (row) {
 554                         selectTableRow(row, do_select);
 555                 }
 556
 557                 var check = document.getElementById(check_id);
 558
 559                 if (check) {
 560                         check.checked = do_select;
 561                 }
 562         } catch (e) {
 563                 exception_error("selectTableRowById", e);
 564         }
 565 }
 566
 567 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 568         classcheck, reset_others) {
 569
 570         var content = document.getElementById(content_id);
 571
 572         if (!content) {
 573                 alert("[selectTableRows] Element " + content_id + " not found.");
 574                 return;
 575         }
 576
 577         for (i = 0; i < content.rows.length; i++) {
 578                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 579
 580                         if (content.rows[i].id.match(prefix)) {
 581                                 selectTableRow(content.rows[i], do_select);
 582
 583                                 var row_id = content.rows[i].id.replace(prefix, "");
 584                                 var check = document.getElementById(check_prefix + row_id);
 585
 586                                 if (check) {
 587                                         check.checked = do_select;
 588                                 }
 589                         } else if (reset_others) {
 590                                 selectTableRow(content.rows[i], false);
 591
 592                                 var row_id = content.rows[i].id.replace(prefix, "");
 593                                 var check = document.getElementById(check_prefix + row_id);
 594
 595                                 if (check) {
 596                                         check.checked = false;
 597                                 }
 598
 599                         }
 600                 } else if (reset_others) {
 601                         selectTableRow(content.rows[i], false);
 602
 603                         var row_id = content.rows[i].id.replace(prefix, "");
 604                         var check = document.getElementById(check_prefix + row_id);
 605
 606                         if (check) {
 607                                 check.checked = false;
 608                         }
 609
 610                 }
 611         }
 612 }
 613
 614 function getSelectedTableRowIds(content_id, prefix) {
 615
 616         var content = document.getElementById(content_id);
 617
 618         if (!content) {
 619                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 620                 return;
 621         }
 622
 623         var sel_rows = new Array();
 624
 625         for (i = 0; i < content.rows.length; i++) {
 626                 if (content.rows[i].id.match(prefix) &&
 627                                 content.rows[i].className.match("Selected")) {
 628
 629                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 630                         sel_rows.push(row_id);
 631                 }
 632         }
 633
 634         return sel_rows;
 635
 636 }
 637
 638 function toggleSelectRowById(sender, id) {
 639         var row = document.getElementById(id);
 640
 641         if (sender.checked) {
 642                 if (!row.className.match("Selected")) {
 643                         row.className = row.className + "Selected";
 644                 }
 645         } else {
 646                 if (row.className.match("Selected")) {
 647                         row.className = row.className.replace("Selected", "");
 648                 }
 649         }
 650 }
 651
 652 function toggleSelectListRow(sender) {
 653         var parent_row = sender.parentNode;
 654
 655         if (sender.checked) {
 656                 if (!parent_row.className.match("Selected")) {
 657                         parent_row.className = parent_row.className + "Selected";
 658                 }
 659         } else {
 660                 if (parent_row.className.match("Selected")) {
 661                         parent_row.className = parent_row.className.replace("Selected", "");
 662                 }
 663         }
 664 }
 665
 666
 667 function toggleSelectRow(sender) {
 668         var parent_row = sender.parentNode.parentNode;
 669
 670         if (sender.checked) {
 671                 if (!parent_row.className.match("Selected")) {
 672                         parent_row.className = parent_row.className + "Selected";
 673                 }
 674         } else {
 675                 if (parent_row.className.match("Selected")) {
 676                         parent_row.className = parent_row.className.replace("Selected", "");
 677                 }
 678         }
 679 }
 680
 681 function openExternalUrl(url) {
 682         var w = window.open(url);
 683 }
 684
 685
 686 function getRelativeFeedId(list, id, direction) {
 687         if (!id) {
 688                 if (direction == "next") {
 689                         for (i = 0; i < list.childNodes.length; i++) {
 690                                 var child = list.childNodes[i];
 691                                 if (child.id == "feedCatHolder") {
 692                                         if (child.lastChild) {
 693                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 694                                                 if (cr) return cr;
 695                                         }
 696                                 } else if (child.id.match("FEEDR-")) {
 697                                         return child.id.replace('FEEDR-', '');
 698                                 }
 699                         }
 700                 }
 701
 702                 // FIXME select last feed doesn't work when only unread feeds are visible
 703
 704                 if (direction == "prev") {
 705                         for (i = list.childNodes.length-1; i >= 0; i--) {
 706                                 var child = list.childNodes[i];
 707                                 if (child.id == "feedCatHolder") {
 708                                         if (child.firstChild) {
 709                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 710                                                 if (cr) return cr;
 711                                         }
 712                                 } else if (child.id.match("FEEDR-")) {
 713
 714                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 715                                                 if (child.className != "feed") {
 716                                                         alert(child.className);
 717                                                         return child.id.replace('FEEDR-', '');
 718                                                 }
 719                                         } else {
 720                                                         return child.id.replace('FEEDR-', '');
 721                                         }
 722                                 }
 723                         }
 724                 }
 725         } else {
 726
 727                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 728
 729                 if (direction == "next") {
 730
 731                         if (feed.nextSibling) {
 732
 733                                 var next_feed = feed.nextSibling;
 734
 735                                 while (!next_feed.id && next_feed.nextSibling) {
 736                                         next_feed = next_feed.nextSibling;
 737                                 }
 738
 739                                 if (getCookie("ttrss_vf_hreadf") == 1) {
 740                                                 while (next_feed && next_feed.className == "feed") {
 741                                                         next_feed = next_feed.nextSibling;
 742                                                 }
 743                                         }
 744
 745                                 if (next_feed && next_feed.id.match("FEEDR-")) {
 746                                         return next_feed.id.replace("FEEDR-", "");
 747                                 }
 748                         }
 749
 750                         var this_cat = feed.parentNode.parentNode;
 751
 752                         if (this_cat && this_cat.nextSibling) {
 753                                 while (this_cat = this_cat.nextSibling) {
 754                                         if (this_cat.firstChild && this_cat.firstChild.firstChild) {
 755                                                 var next_feed = this_cat.firstChild.firstChild;
 756                                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 757                                                         while (next_feed && next_feed.className == "feed") {
 758                                                                 next_feed = next_feed.nextSibling;
 759                                                         }
 760                                                 }
 761                                                 if (next_feed && next_feed.id.match("FEEDR-")) {
 762                                                         return next_feed.id.replace("FEEDR-", "");
 763                                                 }
 764                                         }
 765                                 }
 766                         }
 767                 } else if (direction == "prev") {
 768
 769                         if (feed.previousSibling) {
 770
 771                                 var prev_feed = feed.previousSibling;
 772
 773                                 if (getCookie("ttrss_vf_hreadf") == 1) {
 774                                                 while (prev_feed && prev_feed.className == "feed") {
 775                                                         prev_feed = prev_feed.previousSibling;
 776                                                 }
 777                                         }
 778
 779                                 while (!prev_feed.id && prev_feed.previousSibling) {
 780                                         prev_feed = prev_feed.previousSibling;
 781                                 }
 782
 783                                 if (prev_feed && prev_feed.id.match("FEEDR-")) {
 784                                         return prev_feed.id.replace("FEEDR-", "");
 785                                 }
 786                         }
 787
 788                         var this_cat = feed.parentNode.parentNode;
 789
 790                         if (this_cat && this_cat.previousSibling) {
 791                                 while (this_cat = this_cat.previousSibling) {
 792                                         if (this_cat.lastChild && this_cat.firstChild.lastChild) {
 793                                                 var prev_feed = this_cat.firstChild.lastChild;
 794                                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 795                                                         while (prev_feed && prev_feed.className == "feed") {
 796                                                                 prev_feed = prev_feed.previousSibling;
 797                                                         }
 798                                                 }
 799                                                 if (prev_feed && prev_feed.id.match("FEEDR-")) {
 800                                                         return prev_feed.id.replace("FEEDR-", "");
 801                                                 }
 802                                         }
 803                                 }
 804                         }
 805                 }
 806         }
 807 }
 808
 809 function showBlockElement(id) {
 810         var elem = document.getElementById(id);
 811
 812         if (elem) {
 813                 elem.style.display = "block";
 814         } else {
 815                 alert("[showBlockElement] can't find element with id " + id);
 816         }
 817 }
 818
 819 function hideParentElement(e) {
 820         e.parentNode.style.display = "none";
 821 }
 822
 823 function dropboxSelect(e, v) {
 824         for (i = 0; i < e.length; i++) {
 825                 if (e[i].value == v) {
 826                         e.selectedIndex = i;
 827                         break;
 828                 }
 829         }
 830 }
 831
 832 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 833 // bugfixed just a little bit :-)
 834 function getURLParam(strParamName){
 835   var strReturn = "";
 836   var strHref = window.location.href;
 837
 838   if (strHref.indexOf("#") == strHref.length-1) {
 839                 strHref = strHref.substring(0, strHref.length-1);
 840   }
 841
 842   if ( strHref.indexOf("?") > -1 ){
 843     var strQueryString = strHref.substr(strHref.indexOf("?"));
 844     var aQueryString = strQueryString.split("&");
 845     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 846       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 847         var aParam = aQueryString[iParam].split("=");
 848         strReturn = aParam[1];
 849         break;
 850       }
 851     }
 852   }
 853   return strReturn;
 854 }
 855
 856 function leading_zero(p) {
 857         var s = String(p);
 858         if (s.length == 1) s = "0" + s;
 859         return s;
 860 }