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                         if (child.id == "feedCatHolder") {
 168                                 parent.debug(child.id);
 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 function cleanSelected(element) {
 181         var content = document.getElementById(element);
 182
 183         for (i = 0; i < content.rows.length; i++) {
 184                 content.rows[i].className = content.rows[i].className.replace("Selected", "");
 185         }
 186 }
 187
 188 function getVisibleUnreadHeadlines() {
 189         var content = document.getElementById("headlinesList");
 190
 191         var rows = new Array();
 192
 193         for (i = 0; i < content.rows.length; i++) {
 194                 var row_id = content.rows[i].id.replace("RROW-", "");
 195                 if (row_id.length > 0 && content.rows[i].className.match("Unread")) {
 196                                 rows.push(row_id);
 197                 }
 198         }
 199         return rows;
 200 }
 201
 202 function getVisibleHeadlineIds() {
 203
 204         var content = document.getElementById("headlinesList");
 205
 206         var rows = new Array();
 207
 208         for (i = 0; i < content.rows.length; i++) {
 209                 var row_id = content.rows[i].id.replace("RROW-", "");
 210                 if (row_id.length > 0) {
 211                                 rows.push(row_id);
 212                 }
 213         }
 214         return rows;
 215 }
 216
 217 function getFirstVisibleHeadlineId() {
 218         var rows = getVisibleHeadlineIds();
 219         return rows[0];
 220 }
 221
 222 function getLastVisibleHeadlineId() {
 223         var rows = getVisibleHeadlineIds();
 224         return rows[rows.length-1];
 225 }
 226
 227 function markHeadline(id) {
 228         var row = document.getElementById("RROW-" + id);
 229         if (row) {
 230                 var is_active = false;
 231
 232                 if (row.className.match("Active")) {
 233                         is_active = true;
 234                 }
 235                 row.className = row.className.replace("Selected", "");
 236                 row.className = row.className.replace("Active", "");
 237                 row.className = row.className.replace("Insensitive", "");
 238
 239                 if (is_active) {
 240                         row.className = row.className = "Active";
 241                 }
 242
 243                 var check = document.getElementById("RCHK-" + id);
 244
 245                 if (check) {
 246                         check.checked = true;
 247                 }
 248
 249                 row.className = row.className + "Selected";
 250
 251         }
 252 }
 253
 254 function getFeedIds() {
 255         var content = document.getElementById("feedsList");
 256
 257         var rows = new Array();
 258
 259         for (i = 0; i < content.rows.length; i++) {
 260                 var id = content.rows[i].id.replace("FEEDR-", "");
 261                 if (id.length > 0) {
 262                         rows.push(id);
 263                 }
 264         }
 265
 266         return rows;
 267 }
 268
 269 function setCookie(name, value, lifetime, path, domain, secure) {
 270
 271         var d = false;
 272
 273         if (lifetime) {
 274                 d = new Date();
 275                 d.setTime(lifetime * 1000);
 276         }
 277
 278         int_setCookie(name, value, d, path, domain, secure);
 279
 280 }
 281
 282 function int_setCookie(name, value, expires, path, domain, secure) {
 283         document.cookie= name + "=" + escape(value) +
 284                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
 285                 ((path) ? "; path=" + path : "") +
 286                 ((domain) ? "; domain=" + domain : "") +
 287                 ((secure) ? "; secure" : "");
 288 }
 289
 290 function delCookie(name, path, domain) {
 291         if (getCookie(name)) {
 292                 document.cookie = name + "=" +
 293                 ((path) ? ";path=" + path : "") +
 294                 ((domain) ? ";domain=" + domain : "" ) +
 295                 ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
 296         }
 297 }
 298
 299
 300 function getCookie(name) {
 301
 302         var dc = document.cookie;
 303         var prefix = name + "=";
 304         var begin = dc.indexOf("; " + prefix);
 305         if (begin == -1) {
 306             begin = dc.indexOf(prefix);
 307             if (begin != 0) return null;
 308         }
 309         else {
 310             begin += 2;
 311         }
 312         var end = document.cookie.indexOf(";", begin);
 313         if (end == -1) {
 314             end = dc.length;
 315         }
 316         return unescape(dc.substring(begin + prefix.length, end));
 317 }
 318
 319 function disableContainerChildren(id, disable, doc) {
 320
 321         if (!doc) doc = document;
 322
 323         var container = doc.getElementById(id);
 324
 325         for (var i = 0; i < container.childNodes.length; i++) {
 326                 var child = container.childNodes[i];
 327
 328                 try {
 329                         child.disabled = disable;
 330                 } catch (E) {
 331
 332                 }
 333
 334                 if (disable) {
 335                         if (child.className && child.className.match("button")) {
 336                                 child.className = "disabledButton";
 337                         }
 338                 } else {
 339                         if (child.className && child.className.match("disabledButton")) {
 340                                 child.className = "button";
 341                         }
 342                 }
 343         }
 344
 345 }
 346
 347 function gotoPreferences() {
 348         document.location.href = "prefs.php";
 349 }
 350
 351 function gotoMain() {
 352         document.location.href = "tt-rss.php";
 353 }
 354
 355 function gotoExportOpml() {
 356         document.location.href = "opml.php?op=Export";
 357 }
 358
 359 function getActiveFeedId() {
 360         return getCookie("ttrss_vf_actfeed");
 361 }
 362
 363 function setActiveFeedId(id) {
 364         return setCookie("ttrss_vf_actfeed", id);
 365 }
 366
 367 var xmlhttp_rpc = false;
 368
 369 /*@cc_on @*/
 370 /*@if (@_jscript_version >= 5)
 371 // JScript gives us Conditional compilation, we can cope with old IE versions.
 372 // and security blocked creation of the objects.
 373 try {
 374         xmlhttp_rpc = new ActiveXObject("Msxml2.XMLHTTP");
 375 } catch (e) {
 376         try {
 377                 xmlhttp_rpc = new ActiveXObject("Microsoft.XMLHTTP");
 378         } catch (E) {
 379                 xmlhttp_rpc = false;
 380         }
 381 }
 382 @end @*/
 383
 384 if (!xmlhttp_rpc && typeof XMLHttpRequest!='undefined') {
 385         xmlhttp_rpc = new XMLHttpRequest();
 386 }
 387
 388 function parse_counters(reply, f_document, title_obj, scheduled_call) {
 389         try {
 390                 for (var l = 0; l < reply.childNodes.length; l++) {
 391                         if (!reply.childNodes[l] ||
 392                                 typeof(reply.childNodes[l].getAttribute) == "undefined") {
 393                                 // where did this come from?
 394                                 continue;
 395                         }
 396
 397                         var id = reply.childNodes[l].getAttribute("id");
 398                         var t = reply.childNodes[l].getAttribute("type");
 399                         var ctr = reply.childNodes[l].getAttribute("counter");
 400                         var error = reply.childNodes[l].getAttribute("error");
 401                         var has_img = reply.childNodes[l].getAttribute("hi");
 402                         var updated = reply.childNodes[l].getAttribute("updated");
 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                         var feedlink = f_document.getElementById("FEEDL-" + id);
 423
 424                         if (updated && feedlink) {
 425                                 if (error) {
 426                                         feedlink.title = "Error: " + error + " (" + updated + ")";
 427                                 } else {
 428                                         feedlink.title = "Updated: " + updated;
 429                                 }
 430                         }
 431
 432                         if (feedctr && feedu && feedr) {
 433
 434                                 if (feedu.innerHTML != ctr && id == getActiveFeedId() && scheduled_call) {
 435                                         var hf = title_obj.parent.frames["headlines-frame"];
 436                                         hf.location.reload(true);
 437                                 }
 438
 439                                 feedu.innerHTML = ctr;
 440
 441                                 if (error) {
 442                                         feedr.className = feedr.className.replace("feed", "error");
 443                                 } else if (id > 0) {
 444                                         feedr.className = feedr.className.replace("error", "feed");
 445                                 }
 446
 447                                 if (ctr > 0) {
 448                                         feedctr.className = "odd";
 449                                         if (!feedr.className.match("Unread")) {
 450                                                 var is_selected = feedr.className.match("Selected");
 451
 452                                                 feedr.className = feedr.className.replace("Selected", "");
 453                                                 feedr.className = feedr.className.replace("Unread", "");
 454
 455                                                 feedr.className = feedr.className + "Unread";
 456
 457                                                 if (is_selected) {
 458                                                         feedr.className = feedr.className + "Selected";
 459                                                 }
 460
 461                                         }
 462                                 } else {
 463                                         feedctr.className = "invisible";
 464                                         feedr.className = feedr.className.replace("Unread", "");
 465                                 }
 466                         }
 467                 }
 468         } catch (e) {
 469                 exception_error("parse_counters", e);
 470         }
 471 }
 472
 473 // this one is called from feedlist context
 474 // thus title_obj passed to parse_counters is parent (e.g. main ttrss window)
 475
 476 function all_counters_callback() {
 477         if (xmlhttp_rpc.readyState == 4) {
 478                 try {
 479                         if (!xmlhttp_rpc.responseXML || !xmlhttp_rpc.responseXML.firstChild) {
 480                                 notify("[all_counters_callback] backend did not return valid XML");
 481                                 return;
 482                         }
 483
 484                         if (!parent.frames["feeds-frame"]) {
 485                                 notify("[all_counters_callback] no parent feeds-frame");
 486                                 return;
 487                         }
 488
 489                         var reply = xmlhttp_rpc.responseXML.firstChild;
 490                         var f_document = parent.frames["feeds-frame"].document;
 491
 492                         parse_counters(reply, f_document, parent);
 493
 494                 } catch (e) {
 495                         exception_error("all_counters_callback", e);
 496                 }
 497         }
 498 }
 499
 500 function update_all_counters(feed) {
 501         if (xmlhttp_ready(xmlhttp_rpc)) {
 502                 var query = "backend.php?op=rpc&subop=getAllCounters";
 503
 504                 if (feed > 0) {
 505                         query = query + "&aid=" + feed;
 506                 }
 507
 508                 xmlhttp_rpc.open("GET", query, true);
 509                 xmlhttp_rpc.onreadystatechange=all_counters_callback;
 510                 xmlhttp_rpc.send(null);
 511         }
 512 }
 513
 514 function popupHelp(tid) {
 515         var w = window.open("backend.php?op=help&tid=" + tid,
 516                 "Popup Help",
 517                 "menubar=no,location=no,resizable=yes,scrollbars=yes,status=no");
 518 }
 519
 520 /** * @(#)isNumeric.js * * Copyright (c) 2000 by Sundar Dorai-Raj
 521   * * @author Sundar Dorai-Raj
 522   * * Email: sdoraira@vt.edu
 523   * * This program is free software; you can redistribute it and/or
 524   * * modify it under the terms of the GNU General Public License
 525   * * as published by the Free Software Foundation; either version 2
 526   * * of the License, or (at your option) any later version,
 527   * * provided that any use properly credits the author.
 528   * * This program is distributed in the hope that it will be useful,
 529   * * but WITHOUT ANY WARRANTY; without even the implied warranty of
 530   * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 531   * * GNU General Public License for more details at http://www.gnu.org * * */
 532
 533   var numbers=".0123456789";
 534   function isNumeric(x) {
 535     // is x a String or a character?
 536     if(x.length>1) {
 537       // remove negative sign
 538       x=Math.abs(x)+"";
 539       for(j=0;j<x.length;j++) {
 540         // call isNumeric recursively for each character
 541         number=isNumeric(x.substring(j,j+1));
 542         if(!number) return number;
 543       }
 544       return number;
 545     }
 546     else {
 547       // if x is number return true
 548       if(numbers.indexOf(x)>=0) return true;
 549       return false;
 550     }
 551   }
 552
 553
 554 function hideOrShowFeeds(doc, hide) {
 555
 556         if (!doc.styleSheets) return;
 557
 558         var css_rules = doc.styleSheets[0].cssRules;
 559
 560         if (!css_rules || !css_rules.length) return;
 561
 562         for (i = 0; i < css_rules.length; i++) {
 563                 var rule = css_rules[i];
 564
 565                 if (rule.selectorText == "ul.feedList li.feed") {
 566                         if (!hide) {
 567                                 rule.style.display = "block";
 568                         } else {
 569                                 rule.style.display = "none";
 570                         }
 571                 }
 572
 573         }
 574
 575 }
 576
 577 function fatalError(code, params) {
 578         if (!params) {
 579                 window.location = "error.php?c=" + param_escape(code);
 580         } else {
 581                 window.location = "error.php?c=" + param_escape(code) +
 582                         "&p=" + param_escape(params);
 583         }
 584 }
 585
 586 function selectTableRow(r, do_select) {
 587         r.className = r.className.replace("Selected", "");
 588
 589         if (do_select) {
 590                 r.className = r.className + "Selected";
 591         }
 592 }
 593
 594 function selectTableRowById(elem_id, check_id, do_select) {
 595
 596         try {
 597
 598                 var row = document.getElementById(elem_id);
 599
 600                 if (row) {
 601                         selectTableRow(row, do_select);
 602                 }
 603
 604                 var check = document.getElementById(check_id);
 605
 606                 if (check) {
 607                         check.checked = do_select;
 608                 }
 609         } catch (e) {
 610                 exception_error("selectTableRowById", e);
 611         }
 612 }
 613
 614 function selectTableRowsByIdPrefix(content_id, prefix, check_prefix, do_select,
 615         classcheck, reset_others) {
 616
 617         var content = document.getElementById(content_id);
 618
 619         if (!content) {
 620                 alert("[selectTableRows] Element " + content_id + " not found.");
 621                 return;
 622         }
 623
 624         for (i = 0; i < content.rows.length; i++) {
 625                 if (!classcheck || content.rows[i].className.match(classcheck)) {
 626
 627                         if (content.rows[i].id.match(prefix)) {
 628                                 selectTableRow(content.rows[i], do_select);
 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 = do_select;
 635                                 }
 636                         } else if (reset_others) {
 637                                 selectTableRow(content.rows[i], false);
 638
 639                                 var row_id = content.rows[i].id.replace(prefix, "");
 640                                 var check = document.getElementById(check_prefix + row_id);
 641
 642                                 if (check) {
 643                                         check.checked = false;
 644                                 }
 645
 646                         }
 647                 } else if (reset_others) {
 648                         selectTableRow(content.rows[i], false);
 649
 650                         var row_id = content.rows[i].id.replace(prefix, "");
 651                         var check = document.getElementById(check_prefix + row_id);
 652
 653                         if (check) {
 654                                 check.checked = false;
 655                         }
 656
 657                 }
 658         }
 659 }
 660
 661 function getSelectedTableRowIds(content_id, prefix) {
 662
 663         var content = document.getElementById(content_id);
 664
 665         if (!content) {
 666                 alert("[getSelectedTableRowIds] Element " + content_id + " not found.");
 667                 return;
 668         }
 669
 670         var sel_rows = new Array();
 671
 672         for (i = 0; i < content.rows.length; i++) {
 673                 if (content.rows[i].id.match(prefix) &&
 674                                 content.rows[i].className.match("Selected")) {
 675
 676                         var row_id = content.rows[i].id.replace(prefix + "-", "");
 677                         sel_rows.push(row_id);
 678                 }
 679         }
 680
 681         return sel_rows;
 682
 683 }
 684
 685 function toggleSelectRowById(sender, id) {
 686         var row = document.getElementById(id);
 687
 688         if (sender.checked) {
 689                 if (!row.className.match("Selected")) {
 690                         row.className = row.className + "Selected";
 691                 }
 692         } else {
 693                 if (row.className.match("Selected")) {
 694                         row.className = row.className.replace("Selected", "");
 695                 }
 696         }
 697 }
 698
 699 function toggleSelectListRow(sender) {
 700         var parent_row = sender.parentNode;
 701
 702         if (sender.checked) {
 703                 if (!parent_row.className.match("Selected")) {
 704                         parent_row.className = parent_row.className + "Selected";
 705                 }
 706         } else {
 707                 if (parent_row.className.match("Selected")) {
 708                         parent_row.className = parent_row.className.replace("Selected", "");
 709                 }
 710         }
 711 }
 712
 713
 714 function toggleSelectRow(sender) {
 715         var parent_row = sender.parentNode.parentNode;
 716
 717         if (sender.checked) {
 718                 if (!parent_row.className.match("Selected")) {
 719                         parent_row.className = parent_row.className + "Selected";
 720                 }
 721         } else {
 722                 if (parent_row.className.match("Selected")) {
 723                         parent_row.className = parent_row.className.replace("Selected", "");
 724                 }
 725         }
 726 }
 727
 728 function openExternalUrl(url) {
 729         var w = window.open(url);
 730 }
 731
 732
 733 function getRelativeFeedId(list, id, direction) {
 734         if (!id) {
 735                 if (direction == "next") {
 736                         for (i = 0; i < list.childNodes.length; i++) {
 737                                 var child = list.childNodes[i];
 738                                 if (child.id == "feedCatHolder") {
 739                                         if (child.lastChild) {
 740                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 741                                                 if (cr) return cr;
 742                                         }
 743                                 } else if (child.id.match("FEEDR-")) {
 744                                         return child.id.replace('FEEDR-', '');
 745                                 }
 746                         }
 747                 }
 748
 749                 // FIXME select last feed doesn't work when only unread feeds are visible
 750
 751                 if (direction == "prev") {
 752                         for (i = list.childNodes.length-1; i >= 0; i--) {
 753                                 var child = list.childNodes[i];
 754                                 if (child.id == "feedCatHolder") {
 755                                         if (child.firstChild) {
 756                                                 var cr = getRelativeFeedId(child.firstChild, id, direction);
 757                                                 if (cr) return cr;
 758                                         }
 759                                 } else if (child.id.match("FEEDR-")) {
 760
 761                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 762                                                 if (child.className != "feed") {
 763                                                         alert(child.className);
 764                                                         return child.id.replace('FEEDR-', '');
 765                                                 }
 766                                         } else {
 767                                                         return child.id.replace('FEEDR-', '');
 768                                         }
 769                                 }
 770                         }
 771                 }
 772         } else {
 773
 774                 var feed = list.ownerDocument.getElementById("FEEDR-" + getActiveFeedId());
 775
 776                 if (direction == "next") {
 777
 778                         if (feed.nextSibling) {
 779
 780                                 var next_feed = feed.nextSibling;
 781
 782                                 while (!next_feed.id && next_feed.nextSibling) {
 783                                         next_feed = next_feed.nextSibling;
 784                                 }
 785
 786                                 if (getCookie("ttrss_vf_hreadf") == 1) {
 787                                                 while (next_feed && next_feed.className == "feed") {
 788                                                         next_feed = next_feed.nextSibling;
 789                                                 }
 790                                         }
 791
 792                                 if (next_feed && next_feed.id.match("FEEDR-")) {
 793                                         return next_feed.id.replace("FEEDR-", "");
 794                                 }
 795                         }
 796
 797                         var this_cat = feed.parentNode.parentNode;
 798
 799                         if (this_cat && this_cat.nextSibling) {
 800                                 while (this_cat = this_cat.nextSibling) {
 801                                         if (this_cat.firstChild && this_cat.firstChild.firstChild) {
 802                                                 var next_feed = this_cat.firstChild.firstChild;
 803                                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 804                                                         while (next_feed && next_feed.className == "feed") {
 805                                                                 next_feed = next_feed.nextSibling;
 806                                                         }
 807                                                 }
 808                                                 if (next_feed && next_feed.id.match("FEEDR-")) {
 809                                                         return next_feed.id.replace("FEEDR-", "");
 810                                                 }
 811                                         }
 812                                 }
 813                         }
 814                 } else if (direction == "prev") {
 815
 816                         if (feed.previousSibling) {
 817
 818                                 var prev_feed = feed.previousSibling;
 819
 820                                 if (getCookie("ttrss_vf_hreadf") == 1) {
 821                                                 while (prev_feed && prev_feed.className == "feed") {
 822                                                         prev_feed = prev_feed.previousSibling;
 823                                                 }
 824                                         }
 825
 826                                 while (!prev_feed.id && prev_feed.previousSibling) {
 827                                         prev_feed = prev_feed.previousSibling;
 828                                 }
 829
 830                                 if (prev_feed && prev_feed.id.match("FEEDR-")) {
 831                                         return prev_feed.id.replace("FEEDR-", "");
 832                                 }
 833                         }
 834
 835                         var this_cat = feed.parentNode.parentNode;
 836
 837                         if (this_cat && this_cat.previousSibling) {
 838                                 while (this_cat = this_cat.previousSibling) {
 839                                         if (this_cat.lastChild && this_cat.firstChild.lastChild) {
 840                                                 var prev_feed = this_cat.firstChild.lastChild;
 841                                                         if (getCookie("ttrss_vf_hreadf") == 1) {
 842                                                         while (prev_feed && prev_feed.className == "feed") {
 843                                                                 prev_feed = prev_feed.previousSibling;
 844                                                         }
 845                                                 }
 846                                                 if (prev_feed && prev_feed.id.match("FEEDR-")) {
 847                                                         return prev_feed.id.replace("FEEDR-", "");
 848                                                 }
 849                                         }
 850                                 }
 851                         }
 852                 }
 853         }
 854 }
 855
 856 function showBlockElement(id) {
 857         var elem = document.getElementById(id);
 858
 859         if (elem) {
 860                 elem.style.display = "block";
 861         } else {
 862                 alert("[showBlockElement] can't find element with id " + id);
 863         }
 864 }
 865
 866 function hideParentElement(e) {
 867         e.parentNode.style.display = "none";
 868 }
 869
 870 function dropboxSelect(e, v) {
 871         for (i = 0; i < e.length; i++) {
 872                 if (e[i].value == v) {
 873                         e.selectedIndex = i;
 874                         break;
 875                 }
 876         }
 877 }
 878
 879 // originally stolen from http://www.11tmr.com/11tmr.nsf/d6plinks/MWHE-695L9Z
 880 // bugfixed just a little bit :-)
 881 function getURLParam(strParamName){
 882   var strReturn = "";
 883   var strHref = window.location.href;
 884
 885   if (strHref.indexOf("#") == strHref.length-1) {
 886                 strHref = strHref.substring(0, strHref.length-1);
 887   }
 888
 889   if ( strHref.indexOf("?") > -1 ){
 890     var strQueryString = strHref.substr(strHref.indexOf("?"));
 891     var aQueryString = strQueryString.split("&");
 892     for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
 893       if (aQueryString[iParam].indexOf(strParamName + "=") > -1 ){
 894         var aParam = aQueryString[iParam].split("=");
 895         strReturn = aParam[1];
 896         break;
 897       }
 898     }
 899   }
 900   return strReturn;
 901 }
 902
 903 function leading_zero(p) {
 904         var s = String(p);
 905         if (s.length == 1) s = "0" + s;
 906         return s;
 907 }
 908
 909 function center_element(e) {
 910
 911         try {
 912                 var c_width = document.body.clientWidth;
 913                 var c_height = document.body.clientHeight;
 914
 915                 var c_scroll = document.body.scrollTop;
 916
 917                 var e_width = e.clientWidth;
 918                 var e_height = e.clientHeight;
 919
 920                 var set_y = (c_height / 2) + c_scroll - (e_height / 2);
 921                 var set_x = (c_width / 2) - (e_width / 2);
 922
 923                 e.style.top = set_y + "px";
 924                 e.style.left = set_x + "px";
 925         } catch (e) {
 926                 exception_error("center_element", e);
 927         }
 928 }