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