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 function getVisibleUnreadHeadlines() {
 190         var content = document.getElementById("headlinesList");
 191
 192         var rows = new Array();
 193
 194         for (i = 0; i < content.rows.length; i++) {
 195                 var row_id = content.rows[i].id.replace("RROW-", "");
 196                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 197                                 rows.push(row_id);
 198                 }
 199         }
 200         return rows;
 201 }
 202
 203 function getVisibleHeadlineIds() {
 204
 205         var content = document.getElementById("headlinesList");
 206
 207         var rows = new Array();
 208
 209         for (i = 0; i < content.rows.length; i++) {
 210                 var row_id = content.rows[i].id.replace("RROW-", "");
 211                 if (row_id.length > 0) {
 212                                 rows.push(row_id);
 213                 }
 214         }
 215         return rows;
 216 }
 217
 218 function getFirstVisibleHeadlineId() {
 219         var rows = getVisibleHeadlineIds();
 220         return rows[0];
 221 }
 222
 223 function getLastVisibleHeadlineId() {
 224         var rows = getVisibleHeadlineIds();
 225         return rows[rows.length-1];
 226 }
 227
 228 function markHeadline(id) {
 229         var row = document.getElementById("RROW-" + id);
 230         if (row) {
 231                 var is_active = false;
 232
 233                 if (row.className.match("Active")) {
 234                         is_active = true;
 235                 }
 236                 row.className = row.className.replace("Selected", "");
 237                 row.className = row.className.replace("Active", "");
 238                 row.className = row.className.replace("Insensitive", "");
 239
 240                 if (is_active) {
 241                         row.className = row.className = "Active";
 242                 }
 243
 244                 var check = document.getElementById("RCHK-" + id);
 245
 246                 if (check) {
 247                         check.checked = true;
 248                 }
 249
 250                 row.className = row.className + "Selected";
 251
 252         }
 253 }
 254
 255 function getFeedIds() {
 256         var content = document.getElementById("feedsList");
 257
 258         var rows = new Array();
 259
 260         for (i = 0; i < content.rows.length; i++) {
 261                 var id = content.rows[i].id.replace("FEEDR-", "");
 262                 if (id.length > 0) {
 263                         rows.push(id);
 264                 }
 265         }
 266
 267         return rows;
 268 }
 269
 270 function setCookie(name, value, lifetime, path, domain, secure) {
 271
 272         var d = false;
 273
 274         if (lifetime) {
 275                 d = new Date();
 276                 d.setTime(lifetime * 1000);
 277         }
 278
 279         int_setCookie(name, value, d, path, domain, secure);
 280
 281 }
 282
 283 function int_setCookie(name, value, expires, path, domain, secure) {
 284         document.cookie= name + "=" + escape(value) +
 285                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 286                 ((path) ? "; path=" + path : "") +
 287                 ((domain) ? "; domain=" + domain : "") +
 288                 ((secure) ? "; secure" : "");
 289 }
 290
 291 function delCookie(name, path, domain) {
 292         if (getCookie(name)) {
 293                 document.cookie = name + "=" +
 294                 ((path) ? ";path=" + path : "") +
 295                 ((domain) ? ";domain=" + domain : "" ) +
 296                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 297         }
 298 }
 299
 300
 301 function getCookie(name) {
 302
 303         var dc = document.cookie;
 304         var prefix = name + "=";
 305         var begin = dc.indexOf("; " + prefix);
 306         if (begin == -1) {
 307             begin = dc.indexOf(prefix);
 308             if (begin != 0) return null;
 309         }
 310         else {
 311             begin += 2;
 312         }
 313         var end = document.cookie.indexOf(";", begin);
 314         if (end == -1) {
 315             end = dc.length;
 316         }
 317         return unescape(dc.substring(begin + prefix.length, end));
 318 }
 319
 320 function disableContainerChildren(id, disable, doc) {
 321
 322         if (!doc) doc = document;
 323
 324         var container = doc.getElementById(id);
 325
 326         for (var i = 0; i < container.childNodes.length; i++) {
 327                 var child = container.childNodes[i];
 328
 329                 try {
 330                         child.disabled = disable;
 331                 } catch (E) {
 332
 333                 }
 334
 335                 if (disable) {
 336                         if (child.className && child.className.match("button")) {
 337                                 child.className = "disabledButton";
 338                         }
 339                 } else {
 340                         if (child.className && child.className.match("disabledButton")) {
 341                                 child.className = "button";
 342                         }
 343                 }
 344         }
 345
 346 }
 347
 348 function gotoPreferences() {
 349         document.location.href = "prefs.php";
 350 }
 351
 352 function gotoMain() {
 353         document.location.href = "tt-rss.php";
 354 }
 355
 356 function gotoExportOpml() {
 357         document.location.href = "opml.php?op=Export";
 358 }
 359
 360 function getActiveFeedId() {
 361         return getCookie("ttrss_vf_actfeed");
 362 }
 363
 364 function setActiveFeedId(id) {
 365         return setCookie("ttrss_vf_actfeed", id);
 366 }
 367
 368 var xmlhttp_rpc = false;
 369
 370 /*@cc_on @*/
 371 /*@if (@_jscript_version >= 5)
 372 // JScript gives us Conditional compilation, we can cope with old IE versions.
 373 // and security blocked creation of the objects.
 374 try {
 375         xmlhttp_rpc = new ActiveXObject("Msxml2.XMLHTTP");
 376 } catch (e) {
 377         try {
 378                 xmlhttp_rpc = new ActiveXObject("Microsoft.XMLHTTP");
 379         } catch (E) {
 380                 xmlhttp_rpc = false;
 381         }
 382 }
 383 @end @*/
 384
 385 if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 386         xmlhttp_rpc = new XMLHttpRequest();
 387 }
 388
 389 function parse_counters(reply, f_document, title_obj, scheduled_call) {
 390         try {
 391                 for (var l = 0; l < reply.childNodes.length; l++) {
 392                         if (!reply.childNodes[l] ||
 393                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 394                                 // where did this come from?
 395                                 continue;
 396                         }
 397
 398                         var id = reply.childNodes[l].getAttribute("id");
 399                         var t = reply.childNodes[l].getAttribute("type");
 400                         var ctr = reply.childNodes[l].getAttribute("counter");
 401                         var error = reply.childNodes[l].getAttribute("error");
 402                         var has_img = reply.childNodes[l].getAttribute("hi");
 403
 404                         if (id == "global-unread") {
 405                                 title_obj.global_unread = ctr;
 406                                 title_obj.updateTitle();
 407                                 continue;
 408                         }
 409
 410                         if (t == "category") {
 411                                 var catctr = f_document.getElementById("FCATCTR-" + id);
 412                                 if (catctr) {
 413                                         catctr.innerHTML = "(" + ctr + " unread)";
 414                                 }
 415                                 continue;
 416                         }
 417
 418                         var feedctr = f_document.getElementById("FEEDCTR-" + id);
 419                         var feedu = f_document.getElementById("FEEDU-" + id);
 420                         var feedr = f_document.getElementById("FEEDR-" + id);
 421                         var feed_img = f_document.getElementById("FIMG-" + id);
 422
 423                         if (feedctr && feedu && feedr) {
 424
 425                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 426                                         var hf = title_obj.parent.frames["headlines-frame"];
 427                                         hf.location.reload(true);
 428                                 }
 429
 430                                 feedu.innerHTML = ctr;
 431
 432                                 if (error) {
 433                                         feedr.className = feedr.className.replace("feed", "error");
 434                                 } else if (id > 0) {
 435                                         feedr.className = feedr.className.replace("error", "feed");
 436                                 }
 437
 438                                 if (ctr > 0) {
 439                                         feedctr.className = "odd";
 440                                         if (!feedr.className.match("Unread")) {
 441                                                 var is_selected = feedr.className.match("Selected");
 442
 443                                                 feedr.className = feedr.className.replace("Selected", "");
 444                                                 feedr.className = feedr.className.replace("Unread", "");
 445
 446                                                 feedr.className = feedr.className + "Unread";
 447
 448                                                 if (is_selected) {
 449                                                         feedr.className = feedr.className + "Selected";
 450                                                 }
 451
 452                                         }
 453                                 } else {
 454                                         feedctr.className = "invisible";
 455                                         feedr.className = feedr.className.replace("Unread", "");
 456                                 }
 457                         }
 458                 }
 459         } catch (e) {
 460                 exception_error("parse_counters", e);
 461         }
 462 }
 463
 464 // this one is called from feedlist context
 465 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 466
 467 function all_counters_callback() {
 468         if (xmlhttp_rpc.readyState == 4) {
 469                 try {
 470                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 471                                 notify("[all_counters_callback] backend did not return valid XML");
 472                                 return;
 473                         }
 474
 475                         if (!parent.frames["feeds-frame"]) {
 476                                 notify("[all_counters_callback] no parent feeds-frame");
 477                                 return;
 478                         }
 479
 480                         var reply = xmlhttp_rpc.responseXML.firstChild;
 481                         var f_document = parent.frames["feeds-frame"].document;
 482
 483                         parse_counters(reply, f_document, parent);
 484
 485                 } catch (e) {
 486                         exception_error("all_counters_callback", e);
 487                 }
 488         }
 489 }
 490
 491 function update_all_counters(feed) {
 492         if (xmlhttp_ready(xmlhttp_rpc)) {
 493                 var query = "backend.php?op=rpc&subop=getAllCounters";
 494
 495                 if (feed > 0) {
 496                         query = query + "&aid=" + feed;
 497                 }
 498
 499                 xmlhttp_rpc.open("GET", query, true);
 500                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 501                 xmlhttp_rpc.send(null);
 502         }
 503 }
 504
 505 function popupHelp(tid) {
 506         var w = window.open("backend.php?op=help&tid=" + tid,
 507                 "Popup Help",
 508                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 509 }
 510
 511 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 512   * * @author Sundar Dorai-Raj
 513   * * Email: sdoraira@vt.edu
 514   * * This program is free software; you can redistribute it and/or
 515   * * modify it under the terms of the GNU General Public License
 516   * * as published by the Free Software Foundation; either version 2
 517   * * of the License, or (at your option) any later version,
 518   * * provided that any use properly credits the author.
 519   * * This program is distributed in the hope that it will be useful,
 520   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 521   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 522   * * GNU General Public License for more details at http://www.gnu.org * * */
 523
 524   var numbers=".0123456789";
 525   function isNumeric(x) {
 526     // is x a String or a character?
 527     if(x.length>1) {
 528       // remove negative sign
 529       x=Math.abs(x)+"";
 530       for(j=0;j<x.length;j++) {
 531         // call isNumeric recursively for each character
 532         number=isNumeric(x.substring(j,j+1));
 533         if(!number) return number;
 534       }
 535       return number;
 536     }
 537     else {
 538       // if x is number return true
 539       if(numbers.indexOf(x)>=0) return true;
 540       return false;
 541     }
 542   }
 543
 544
 545 function hideOrShowFeeds(doc, hide) {
 546
 547         if (!doc.styleSheets) return;
 548
 549         var css_rules = doc.styleSheets[0].cssRules;
 550
 551         if (!css_rules || !css_rules.length) return;
 552
 553         for (i = 0; i < css_rules.length; i++) {
 554                 var rule = css_rules[i];
 555
 556                 if (rule.selectorText == "ul.feedList li.feed") {
 557                         if (!hide) {
 558                                 rule.style.display = "block";
 559                         } else {
 560                                 rule.style.display = "none";
 561                         }
 562                 }
 563
 564         }
 565
 566 }
 567
 568 function fatalError(code, params) {
 569         if (!params) {
 570                 window.location = "error.php?c=" + param_escape(code);
 571         } else {
 572                 window.location = "error.php?c=" + param_escape(code) +
 573                         "&p=" + param_escape(params);
 574         }
 575 }
 576
 577 function selectTableRow(r, do_select) {
 578         r.className = r.className.replace("Selected", "");
 579
 580         if (do_select) {
 581                 r.className = r.className + "Selected";
 582         }
 583 }
 584
 585 function selectTableRowById(elem_id, check_id, do_select) {
 586
 587         try {
 588
 589                 var row = document.getElementById(elem_id);
 590
 591                 if (row) {
 592                         selectTableRow(row, do_select);
 593                 }
 594
 595                 var check = document.getElementById(check_id);
 596
 597                 if (check) {
 598                         check.checked = do_select;
 599                 }
 600         } catch (e) {
 601                 exception_error("selectTableRowById", e);
 602         }
 603 }
 604
 605 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 606         classcheck, reset_others) {
 607
 608         var content = document.getElementById(content_id);
 609
 610         if (!content) {
 611                 alert("[selectTableRows] Element " + content_id + " not found.");
 612                 return;
 613         }
 614
 615         for (i = 0; i < content.rows.length; i++) {
 616                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 617
 618                         if (content.rows[i].id.match(prefix)) {
 619                                 selectTableRow(content.rows[i], do_select);
 620
 621                                 var row_id = content.rows[i].id.replace(prefix, "");
 622                                 var check = document.getElementById(check_prefix + row_id);
 623
 624                                 if (check) {
 625                                         check.checked = do_select;
 626                                 }
 627                         } else if (reset_others) {
 628                                 selectTableRow(content.rows[i], false);
 629
 630                                 var row_id = content.rows[i].id.replace(prefix, "");
 631                                 var check = document.getElementById(check_prefix + row_id);
 632
 633                                 if (check) {
 634                                         check.checked = false;
 635                                 }
 636
 637                         }
 638                 } else if (reset_others) {
 639                         selectTableRow(content.rows[i], false);
 640
 641                         var row_id = content.rows[i].id.replace(prefix, "");
 642                         var check = document.getElementById(check_prefix + row_id);
 643
 644                         if (check) {
 645                                 check.checked = false;
 646                         }
 647
 648                 }
 649         }
 650 }
 651
 652 function getSelectedTableRowIds(content_id, prefix) {
 653
 654         var content = document.getElementById(content_id);
 655
 656         if (!content) {
 657                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 658                 return;
 659         }
 660
 661         var sel_rows = new Array();
 662
 663         for (i = 0; i < content.rows.length; i++) {
 664                 if (content.rows[i].id.match(prefix) &&
 665                                 content.rows[i].className.match("Selected")) {
 666
 667                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 668                         sel_rows.push(row_id);
 669                 }
 670         }
 671
 672         return sel_rows;
 673
 674 }
 675
 676 function toggleSelectRowById(sender, id) {
 677         var row = document.getElementById(id);
 678
 679         if (sender.checked) {
 680                 if (!row.className.match("Selected")) {
 681                         row.className = row.className + "Selected";
 682                 }
 683         } else {
 684                 if (row.className.match("Selected")) {
 685                         row.className = row.className.replace("Selected", "");
 686                 }
 687         }
 688 }
 689
 690 function toggleSelectListRow(sender) {
 691         var parent_row = sender.parentNode;
 692
 693         if (sender.checked) {
 694                 if (!parent_row.className.match("Selected")) {
 695                         parent_row.className = parent_row.className + "Selected";
 696                 }
 697         } else {
 698                 if (parent_row.className.match("Selected")) {
 699                         parent_row.className = parent_row.className.replace("Selected", "");
 700                 }
 701         }
 702 }
 703
 704
 705 function toggleSelectRow(sender) {
 706         var parent_row = sender.parentNode.parentNode;
 707
 708         if (sender.checked) {
 709                 if (!parent_row.className.match("Selected")) {
 710                         parent_row.className = parent_row.className + "Selected";
 711                 }
 712         } else {
 713                 if (parent_row.className.match("Selected")) {
 714                         parent_row.className = parent_row.className.replace("Selected", "");
 715                 }
 716         }
 717 }
 718
 719 function openExternalUrl(url) {
 720         var w = window.open(url);
 721 }
 722
 723
 724 function getRelativeFeedId(list, id, direction) {
 725         if (!id) {
 726                 if (direction == "next") {
 727                         for (i = 0; i < list.childNodes.length; i++) {
 728                                 var child = list.childNodes[i];
 729                                 if (child.id == "feedCatHolder") {
 730                                         if (child.lastChild) {
 731                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 732                                                 if (cr) return cr;
 733                                         }
 734                                 } else if (child.id.match("FEEDR-")) {
 735                                         return child.id.replace('FEEDR-', '');
 736                                 }
 737                         }
 738                 }
 739
 740                 // FIXME select last feed doesn't work when only unread feeds are visible
 741
 742                 if (direction == "prev") {
 743                         for (i = list.childNodes.length-1; i >= 0; i--) {
 744                                 var child = list.childNodes[i];
 745                                 if (child.id == "feedCatHolder") {
 746                                         if (child.firstChild) {
 747                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 748                                                 if (cr) return cr;
 749                                         }
 750                                 } else if (child.id.match("FEEDR-")) {
 751
 752                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 753                                                 if (child.className != "feed") {
 754                                                         alert(child.className);
 755                                                         return child.id.replace('FEEDR-', '');
 756                                                 }
 757                                         } else {
 758                                                         return child.id.replace('FEEDR-', '');
 759                                         }
 760                                 }
 761                         }
 762                 }
 763         } else {
 764
 765                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 766
 767                 if (direction == "next") {
 768
 769                         if (feed.nextSibling) {
 770
 771                                 var next_feed = feed.nextSibling;
 772
 773                                 while (!next_feed.id && next_feed.nextSibling) {
 774                                         next_feed = next_feed.nextSibling;
 775                                 }
 776
 777                                 if (getCookie("ttrss_vf_hreadf") == 1) {
 778                                                 while (next_feed && next_feed.className == "feed") {
 779                                                         next_feed = next_feed.nextSibling;
 780                                                 }
 781                                         }
 782
 783                                 if (next_feed && next_feed.id.match("FEEDR-")) {
 784                                         return next_feed.id.replace("FEEDR-", "");
 785                                 }
 786                         }
 787
 788                         var this_cat = feed.parentNode.parentNode;
 789
 790                         if (this_cat && this_cat.nextSibling) {
 791                                 while (this_cat = this_cat.nextSibling) {
 792                                         if (this_cat.firstChild && this_cat.firstChild.firstChild) {
 793                                                 var next_feed = this_cat.firstChild.firstChild;
 794                                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 795                                                         while (next_feed && next_feed.className == "feed") {
 796                                                                 next_feed = next_feed.nextSibling;
 797                                                         }
 798                                                 }
 799                                                 if (next_feed && next_feed.id.match("FEEDR-")) {
 800                                                         return next_feed.id.replace("FEEDR-", "");
 801                                                 }
 802                                         }
 803                                 }
 804                         }
 805                 } else if (direction == "prev") {
 806
 807                         if (feed.previousSibling) {
 808
 809                                 var prev_feed = feed.previousSibling;
 810
 811                                 if (getCookie("ttrss_vf_hreadf") == 1) {
 812                                                 while (prev_feed && prev_feed.className == "feed") {
 813                                                         prev_feed = prev_feed.previousSibling;
 814                                                 }
 815                                         }
 816
 817                                 while (!prev_feed.id && prev_feed.previousSibling) {
 818                                         prev_feed = prev_feed.previousSibling;
 819                                 }
 820
 821                                 if (prev_feed && prev_feed.id.match("FEEDR-")) {
 822                                         return prev_feed.id.replace("FEEDR-", "");
 823                                 }
 824                         }
 825
 826                         var this_cat = feed.parentNode.parentNode;
 827
 828                         if (this_cat && this_cat.previousSibling) {
 829                                 while (this_cat = this_cat.previousSibling) {
 830                                         if (this_cat.lastChild && this_cat.firstChild.lastChild) {
 831                                                 var prev_feed = this_cat.firstChild.lastChild;
 832                                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 833                                                         while (prev_feed && prev_feed.className == "feed") {
 834                                                                 prev_feed = prev_feed.previousSibling;
 835                                                         }
 836                                                 }
 837                                                 if (prev_feed && prev_feed.id.match("FEEDR-")) {
 838                                                         return prev_feed.id.replace("FEEDR-", "");
 839                                                 }
 840                                         }
 841                                 }
 842                         }
 843                 }
 844         }
 845 }
 846
 847 function showBlockElement(id) {
 848         var elem = document.getElementById(id);
 849
 850         if (elem) {
 851                 elem.style.display = "block";
 852         } else {
 853                 alert("[showBlockElement] can't find element with id " + id);
 854         }
 855 }
 856
 857 function hideParentElement(e) {
 858         e.parentNode.style.display = "none";
 859 }
 860
 861 function dropboxSelect(e, v) {
 862         for (i = 0; i < e.length; i++) {
 863                 if (e[i].value == v) {
 864                         e.selectedIndex = i;
 865                         break;
 866                 }
 867         }
 868 }
 869
 870 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 871 // bugfixed just a little bit :-)
 872 function getURLParam(strParamName){
 873   var strReturn = "";
 874   var strHref = window.location.href;
 875
 876   if (strHref.indexOf("#") == strHref.length-1) {
 877                 strHref = strHref.substring(0, strHref.length-1);
 878   }
 879
 880   if ( strHref.indexOf("?") > -1 ){
 881     var strQueryString = strHref.substr(strHref.indexOf("?"));
 882     var aQueryString = strQueryString.split("&");
 883     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 884       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 885         var aParam = aQueryString[iParam].split("=");
 886         strReturn = aParam[1];
 887         break;
 888       }
 889     }
 890   }
 891   return strReturn;
 892 }
 893
 894 function leading_zero(p) {
 895         var s = String(p);
 896         if (s.length == 1) s = "0" + s;
 897         return s;
 898 }
 899
 900 function center_element(e) {
 901
 902         try {
 903                 var c_width = document.body.clientWidth;
 904                 var c_height = document.body.clientHeight;
 905
 906                 var c_scroll = document.body.scrollTop;
 907
 908                 var e_width = e.clientWidth;
 909                 var e_height = e.clientHeight;
 910
 911                 var set_y = (c_height / 2) + c_scroll - (e_height / 2);
 912                 var set_x = (c_width / 2) - (e_width / 2);
 913
 914                 e.style.top = set_y + "px";
 915                 e.style.left = set_x + "px";
 916         } catch (e) {
 917                 exception_error("center_element", e);
 918         }
 919 }