library/js/CategoryTreeMenu.js

   1 // +-----------------------------------------------------------------------+
   2 // | Copyright (c) 2002-2003, Richard Heyes, Harald Radi                        |
   3 // | All rights reserved.                                                  |
   4 // |                                                                       |
   5 // | Redistribution and use in source and binary forms, with or without    |
   6 // | modification, are permitted provided that the following conditions    |
   7 // | are met:                                                              |
   8 // |                                                                       |
   9 // | o Redistributions of source code must retain the above copyright      |
  10 // |   notice, this list of conditions and the following disclaimer.       |
  11 // | o Redistributions in binary form must reproduce the above copyright   |
  12 // |   notice, this list of conditions and the following disclaimer in the |
  13 // |   documentation and/or other materials provided with the distribution.|
  14 // | o The names of the authors may not be used to endorse or promote      |
  15 // |   products derived from this software without specific prior written  |
  16 // |   permission.                                                         |
  17 // |                                                                       |
  18 // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   |
  19 // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     |
  20 // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
  21 // | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT  |
  22 // | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
  23 // | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      |
  24 // | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
  25 // | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
  26 // | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT   |
  27 // | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
  28 // | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  |
  29 // |                                                                       |
  30 // +-----------------------------------------------------------------------+
  31 // | Author: Richard Heyes <richard@phpguru.org>                           |
  32 // |         Harald Radi <harald.radi@nme.at>                              |
  33 // +-----------------------------------------------------------------------+
  34 //
  35 // $Id$
  36
  37 /**
  38 * Function to create copies of objects which are
  39 * normally passed around by references (Arrays for example)
  40 */
  41 function arrayCopy(input)
  42 {
  43         var output = new Array(input.length);
  44
  45         for (i in input) {
  46                 if (typeof(input[i]) == 'array') {
  47                         output[i] = arrayCopy(input[i]);
  48                 } else {
  49                         output[i] = input[i];
  50                 }
  51         }
  52
  53         return output;
  54 }
  55
  56 /**
  57 * TreeMenu class
  58 */
  59         function TreeMenu(iconpath, myname, linkTarget, defaultClass, usePersistence, noTopLevelImages)
  60         {
  61                 // Properties
  62                 this.iconpath         = iconpath;
  63                 this.myname           = myname;
  64                 this.linkTarget       = linkTarget;
  65                 this.defaultClass     = defaultClass;
  66                 this.usePersistence   = usePersistence;
  67                 this.noTopLevelImages = noTopLevelImages;
  68                 this.n                = new Array();
  69                 this.output           = '';
  70
  71                 this.nodeRefs       = new Array();
  72                 this.branches       = new Array();
  73                 this.branchStatus   = new Array();
  74                 this.layerRelations = new Array();
  75                 this.childParents   = new Array();
  76                 this.cookieStatuses = new Array();
  77
  78                 this.preloadImages();
  79         }
  80
  81 /**
  82 * Adds a node to the tree
  83 */
  84         TreeMenu.prototype.addItem = function (newNode)
  85         {
  86                 newIndex = this.n.length;
  87                 this.n[newIndex] = newNode;
  88
  89                 return this.n[newIndex];
  90         }
  91
  92 /**
  93 * Preload images hack for Mozilla
  94 */
  95         TreeMenu.prototype.preloadImages = function ()
  96         {
  97                 var plustop    = new Image; plustop.src    = this.iconpath + '/plustop.gif';
  98                 var plusbottom = new Image; plusbottom.src = this.iconpath + '/plusbottom.gif';
  99                 var plus       = new Image; plus.src       = this.iconpath + '/plus.gif';
 100
 101                 var minustop    = new Image; minustop.src    = this.iconpath + '/minustop.gif';
 102                 var minusbottom = new Image; minusbottom.src = this.iconpath + '/minusbottom.gif';
 103                 var minus       = new Image; minus.src       = this.iconpath + '/minus.gif';
 104
 105                 var branchtop    = new Image; branchtop.src    = this.iconpath + '/branchtop.gif';
 106                 var branchbottom = new Image; branchbottom.src = this.iconpath + '/branchbottom.gif';
 107                 var branch       = new Image; branch.src       = this.iconpath + '/branch.gif';
 108
 109                 var linebottom = new Image; linebottom.src = this.iconpath + '/linebottom.gif';
 110                 var line       = new Image; line.src       = this.iconpath + '/line.gif';
 111         }
 112
 113 /**
 114 * Main function that draws the menu and assigns it
 115 * to the layer (or document.write()s it)
 116 */
 117         TreeMenu.prototype.drawMenu = function ()// OPTIONAL ARGS: nodes = [], level = [], prepend = '', expanded = false, visbility = 'inline', parentLayerID = null
 118         {
 119                 /**
 120             * Necessary variables
 121             */
 122                 var output        = '';
 123                 var modifier      = '';
 124                 var layerID       = '';
 125                 var parentLayerID = '';
 126
 127                 /**
 128             * Parse any optional arguments
 129             */
 130                 var nodes         = arguments[0] ? arguments[0] : this.n
 131                 var level         = arguments[1] ? arguments[1] : [];
 132                 var prepend       = arguments[2] ? arguments[2] : '';
 133                 var expanded      = arguments[3] ? arguments[3] : false;
 134                 var visibility    = arguments[4] ? arguments[4] : 'inline';
 135                 var parentLayerID = arguments[5] ? arguments[5] : null;
 136
 137                 var currentlevel  = level.length;
 138
 139                 for (var i=0; i<nodes.length; i++) {
 140
 141                         level[currentlevel] = i+1;
 142                         layerID = this.myname + '_' + 'node_' + this.implode('_', level);
 143
 144                         /**
 145             * Store this object in the nodeRefs array
 146             */
 147                         this.nodeRefs[layerID] = nodes[i];
 148
 149                         /**
 150                 * Store the child/parent relationship
 151                 */
 152                         this.childParents[layerID] = parentLayerID;
 153
 154                         /**
 155                 * Gif modifier
 156                 */
 157                         if (i == 0 && parentLayerID == null) {
 158                                 modifier = nodes.length > 1 ? "top" : 'single';
 159                         } else if(i == (nodes.length-1)) {
 160                                 modifier = "bottom";
 161                         } else {
 162                                 modifier = "";
 163                         }
 164
 165                         /**
 166                 * Single root branch is always expanded
 167                 */
 168                         if (!this.doesMenu() || (parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages))) {
 169                                 expanded = true;
 170
 171                         } else if (nodes[i].expanded) {
 172                                 expanded = true;
 173
 174                         } else {
 175                                 expanded = false;
 176                         }
 177
 178                         /**
 179                 * Make sure visibility is correct based on parent status
 180                 */
 181                         visibility =  this.checkParentVisibility(layerID) ? visibility : 'none';
 182
 183                         /**
 184                 * Setup branch status and build an indexed array
 185                         * of branch layer ids
 186                 */
 187                         if (nodes[i].n.length > 0) {
 188                                 this.branchStatus[layerID] = expanded;
 189                                 this.branches[this.branches.length] = layerID;
 190                         }
 191
 192                         /**
 193                 * Setup toggle relationship
 194                 */
 195                         if (!this.layerRelations[parentLayerID]) {
 196                                 this.layerRelations[parentLayerID] = new Array();
 197                         }
 198                         this.layerRelations[parentLayerID][this.layerRelations[parentLayerID].length] = layerID;
 199
 200                         /**
 201                 * Branch images
 202                 */
 203                         var gifname  = nodes[i].n.length && this.doesMenu() && nodes[i].isDynamic ? (expanded ? 'minus' : 'plus') : 'branch';
 204                         var iconName = expanded && nodes[i].expandedIcon ? nodes[i].expandedIcon : nodes[i].icon;
 205                         var iconimg  = nodes[i].icon ? this.stringFormat('<img src="{0}/{1}" width="20" height="20" align="top" id="icon_{2}">', this.iconpath, iconName, layerID) : '';
 206
 207                         /**
 208                         * Add event handlers
 209                         */
 210                         var eventHandlers = "";
 211                         for (j in nodes[i].events) {
 212                                 eventHandlers += this.stringFormat('{0}="{1}" ', j, nodes[i].events[j]);
 213                         }
 214
 215                         /**
 216                 * Build the html to write to the document
 217                         * IMPORTANT:
 218                         * document.write()ing the string: '<div style="display:...' will screw up nn4.x
 219                 */
 220                         var layerTag  = this.doesMenu() ? this.stringFormat('<div id="{0}" style="display: {1}" class="{2}">', layerID, visibility, (nodes[i].cssClass ? nodes[i].cssClass : this.defaultClass)) : this.stringFormat('<div class="{0}">', nodes[i].cssClass ? nodes[i].cssClass : this.defaultClass);
 221                         var onMDown   = this.doesMenu() && nodes[i].n.length  && nodes[i].isDynamic ? this.stringFormat('onmousedown="{0}.toggleBranch(\'{1}\', true)" style="cursor: pointer; cursor: hand"', this.myname, layerID) : '';
 222                         var imgTag    = this.stringFormat('<img src="{0}/{1}{2}.gif" width="20" height="20" align="top" border="0" name="img_{3}" {4}>', this.iconpath, gifname, modifier, layerID, onMDown);
 223                         var linkTarget= nodes[i].linkTarget ? nodes[i].linkTarget : this.linkTarget;
 224                         var linkStart = nodes[i].link ? this.stringFormat('<a href="{0}" target="{1}">', nodes[i].link, linkTarget) : '';
 225                         var delLink       = nodes[i].link.replace('add_node','delete_node');
 226       var editLink = nodes[i].link.replace('add_node','edit_node');
 227       var linkEnd = nodes[i].link ? '</a>' +
 228         '&nbsp;&nbsp;<a href="' + editLink + '" style="text-decoration:none;">' +
 229         '<span style="font-size:70%; font-family: sans-serif;">(' + editLabel + ')</span></a>' +
 230         '&nbsp;&nbsp;<a href="' + delLink  + 'process=1" style="text-decoration:none;">' +
 231         '<span style="color:red; font-size:70%; font-family: sans-serif;">(' + deleteLabel + ')</span></a>'
 232         : '';
 233
 234                         this.output += this.stringFormat('{0}<nobr>{1}{2}{3}{4}<span {5}>{6}</span>{7}</nobr><br></div>',
 235                                           layerTag,
 236                                                           prepend,
 237                                           parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages) ? '' : imgTag,
 238                                                           iconimg,
 239                                                           linkStart,
 240                                                           eventHandlers,
 241                                                           nodes[i].title,
 242                                                           linkEnd);
 243
 244                         /**
 245                 * Traverse sub nodes ?
 246                 */
 247                         if (nodes[i].n.length) {
 248                                 /**
 249                     * Determine what to prepend. If there is only one root
 250                                 * node then the prepend to pass to children is nothing.
 251                                 * Otherwise it depends on where we are in the tree.
 252                     */
 253                                 if (parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages)) {
 254                                         var newPrepend = '';
 255
 256                                 } else if (i < (nodes.length - 1)) {
 257                                         var newPrepend = prepend + this.stringFormat('<img src="{0}/line.gif" width="20" height="20" align="top">', this.iconpath);
 258
 259                                 } else {
 260                                         var newPrepend = prepend + this.stringFormat('<img src="{0}/linebottom.gif" width="20" height="20" align="top">', this.iconpath);
 261                                 }
 262
 263                                 this.drawMenu(nodes[i].n,
 264                                               arrayCopy(level),
 265                                               newPrepend,
 266                                               nodes[i].expanded,
 267                                               expanded ? 'inline' : 'none',
 268                                               layerID);
 269                         }
 270                 }
 271         }
 272
 273 /**
 274 * Writes the output generated by drawMenu() to the page
 275 */
 276         TreeMenu.prototype.writeOutput = function ()
 277         {
 278                 document.write(this.output);
 279         }
 280
 281 /**
 282 * Toggles a branches visible status. Called from resetBranches()
 283 * and also when a +/- graphic is clicked.
 284 */
 285         TreeMenu.prototype.toggleBranch = function (layerID, updateStatus) // OPTIONAL ARGS: fireEvents = true
 286         {
 287                 var currentDisplay = this.getLayer(layerID).style.display;
 288                 var newDisplay     = (this.branchStatus[layerID] && currentDisplay == 'inline') ? 'none' : 'inline';
 289                 var fireEvents     = arguments[2] != null ? arguments[2] : true;
 290
 291                 for (var i=0; i<this.layerRelations[layerID].length; i++) {
 292
 293                         if (this.branchStatus[this.layerRelations[layerID][i]]) {
 294                                 this.toggleBranch(this.layerRelations[layerID][i], false);
 295                         }
 296
 297                         this.getLayer(this.layerRelations[layerID][i]).style.display = newDisplay;
 298                 }
 299
 300                 if (updateStatus) {
 301                         this.branchStatus[layerID] = !this.branchStatus[layerID];
 302
 303                         /**
 304                 * Persistence
 305                 */
 306                         if (this.doesPersistence() && !arguments[2] && this.usePersistence) {
 307                                 this.setExpandedStatusForCookie(layerID, this.branchStatus[layerID]);
 308                         }
 309
 310                         /**
 311                         * Fire custom events
 312                         */
 313                         if (fireEvents) {
 314                                 nodeObject = this.nodeRefs[layerID];
 315
 316                                 if (nodeObject.ontoggle != null) {
 317                                         eval(nodeObject.ontoggle);
 318                                 }
 319
 320                                 if (newDisplay == 'none' && nodeObject.oncollapse != null) {
 321                                         eval(nodeObject.oncollapse);
 322                                 } else if (newDisplay == 'inline' && nodeObject.onexpand != null){
 323                                         eval(nodeObject.onexpand);
 324                                 }
 325                         }
 326
 327                         // Swap image
 328                         this.swapImage(layerID);
 329                 }
 330
 331                 // Swap icon
 332                 this.swapIcon(layerID);
 333         }
 334
 335 /**
 336 * Swaps the plus/minus branch images
 337 */
 338         TreeMenu.prototype.swapImage = function (layerID)
 339         {
 340                 var imgSrc = document.images['img_' + layerID].src;
 341
 342                 var re = /^(.*)(plus|minus)(bottom|top|single)?.gif$/
 343                 if (matches = imgSrc.match(re)) {
 344
 345                         document.images['img_' + layerID].src = this.stringFormat('{0}{1}{2}{3}',
 346                                                                         matches[1],
 347                                                                                                                         matches[2] == 'plus' ? 'minus' : 'plus',
 348                                                                                                                         matches[3] ? matches[3] : '',
 349                                                                                                                         '.gif');
 350                 }
 351         }
 352
 353 /**
 354 * Swaps the icon for the expanded icon if one
 355 * has been supplied.
 356 */
 357         TreeMenu.prototype.swapIcon = function (layerID)
 358         {
 359                 if (document.images['icon_' + layerID]) {
 360                         var imgSrc = document.images['icon_' + layerID].src;
 361
 362                         if (this.nodeRefs[layerID].icon && this.nodeRefs[layerID].expandedIcon) {
 363                                 var newSrc = (imgSrc.indexOf(this.nodeRefs[layerID].expandedIcon) == -1 ? this.nodeRefs[layerID].expandedIcon : this.nodeRefs[layerID].icon);
 364
 365                                 document.images['icon_' + layerID].src = this.iconpath + '/' + newSrc;
 366                         }
 367                 }
 368         }
 369
 370 /**
 371 * Can the browser handle the dynamic menu?
 372 */
 373         TreeMenu.prototype.doesMenu = function ()
 374         {
 375                 return (is_ie4up || is_nav6up || is_gecko || is_opera7);
 376         }
 377
 378 /**
 379 * Can the browser handle save the branch status
 380 */
 381         TreeMenu.prototype.doesPersistence = function ()
 382         {
 383                 return (is_ie4up || is_gecko || is_nav6up || is_opera7);
 384         }
 385
 386 /**
 387 * Returns the appropriate layer accessor
 388 */
 389         TreeMenu.prototype.getLayer = function (layerID)
 390         {
 391                 if (is_ie4) {
 392                         return document.all(layerID);
 393
 394                 } else if (document.getElementById(layerID)) {
 395                         return document.getElementById(layerID);
 396
 397                 } else if (document.all(layerID)) {
 398                         return document.all(layerID);
 399                 }
 400         }
 401
 402 /**
 403 * Save the status of the layer
 404 */
 405         TreeMenu.prototype.setExpandedStatusForCookie = function (layerID, expanded)
 406         {
 407                 this.cookieStatuses[layerID] = expanded;
 408                 this.saveCookie();
 409         }
 410
 411 /**
 412 * Load the status of the layer
 413 */
 414         TreeMenu.prototype.getExpandedStatusFromCookie = function (layerID)
 415         {
 416                 if (this.cookieStatuses[layerID]) {
 417                         return this.cookieStatuses[layerID];
 418                 }
 419
 420                 return false;
 421         }
 422
 423 /**
 424 * Saves the cookie that holds which branches are expanded.
 425 * Only saves the details of the branches which are expanded.
 426 */
 427         TreeMenu.prototype.saveCookie = function ()
 428         {
 429                 var cookieString = new Array();
 430
 431                 for (var i in this.cookieStatuses) {
 432                         if (this.cookieStatuses[i] == true) {
 433                                 cookieString[cookieString.length] = i;
 434                         }
 435                 }
 436
 437                 document.cookie = 'TreeMenuBranchStatus=' + cookieString.join(':');
 438         }
 439
 440 /**
 441 * Reads cookie parses it for status info and
 442 * stores that info in the class member.
 443 */
 444         TreeMenu.prototype.loadCookie = function ()
 445         {
 446                 var cookie = document.cookie.split('; ');
 447
 448                 for (var i=0; i < cookie.length; i++) {
 449                         var crumb = cookie[i].split('=');
 450                         if ('TreeMenuBranchStatus' == crumb[0] && crumb[1]) {
 451                                 var expandedBranches = crumb[1].split(':');
 452                                 for (var j=0; j<expandedBranches.length; j++) {
 453                                         this.cookieStatuses[expandedBranches[j]] = true;
 454                                 }
 455                         }
 456                 }
 457         }
 458
 459 /**
 460 * Reset branch status
 461 */
 462         TreeMenu.prototype.resetBranches = function ()
 463         {
 464                 if (!this.doesPersistence()) {
 465                         return false;
 466                 }
 467
 468                 this.loadCookie();
 469
 470                 for (var i=0; i<this.branches.length; i++) {
 471                         var status = this.getExpandedStatusFromCookie(this.branches[i]);
 472                         // Only update if it's supposed to be expanded and it's not already
 473                         if (status == true && this.branchStatus[this.branches[i]] != true) {
 474                                 if (this.checkParentVisibility(this.branches[i])) {
 475                                         this.toggleBranch(this.branches[i], true, false);
 476                                 } else {
 477                                         this.branchStatus[this.branches[i]] = true;
 478                                         this.swapImage(this.branches[i]);
 479                                 }
 480                         }
 481                 }
 482         }
 483
 484 /**
 485 * Checks whether a branch should be open
 486 * or not based on its parents' status
 487 */
 488         TreeMenu.prototype.checkParentVisibility = function (layerID)
 489         {
 490                 if (this.in_array(this.childParents[layerID], this.branches)
 491                     && this.branchStatus[this.childParents[layerID]]
 492                         && this.checkParentVisibility(this.childParents[layerID]) ) {
 493
 494                         return true;
 495
 496                 } else if (this.childParents[layerID] == null) {
 497                         return true;
 498                 }
 499
 500                 return false;
 501         }
 502
 503 /**
 504 * New C# style string formatter
 505 */
 506         TreeMenu.prototype.stringFormat = function (strInput)
 507         {
 508                 var idx = 0;
 509
 510                 for (var i=1; i<arguments.length; i++) {
 511                         while ((idx = strInput.indexOf('{' + (i - 1) + '}', idx)) != -1) {
 512                                 strInput = strInput.substring(0, idx) + arguments[i] + strInput.substr(idx + 3);
 513                         }
 514                 }
 515
 516                 return strInput;
 517         }
 518
 519 /**
 520 * Also much adored, the PHP implode() function
 521 */
 522         TreeMenu.prototype.implode = function (seperator, input)
 523         {
 524                 var output = '';
 525
 526                 for (var i=0; i<input.length; i++) {
 527                         if (i == 0) {
 528                                 output += input[i];
 529                         } else {
 530                                 output += seperator + input[i];
 531                         }
 532                 }
 533
 534                 return output;
 535         }
 536
 537 /**
 538 * Aah, all the old favourites are coming out...
 539 */
 540         TreeMenu.prototype.in_array = function (item, arr)
 541         {
 542                 for (var i=0; i<arr.length; i++) {
 543                         if (arr[i] == item) {
 544                                 return true;
 545                         }
 546                 }
 547
 548                 return false;
 549         }
 550
 551 /**
 552 * TreeNode Class
 553 */
 554         function TreeNode(title, icon, link, expanded, isDynamic, cssClass, linkTarget, expandedIcon)
 555         {
 556                 this.title        = title;
 557                 this.icon         = icon;
 558                 this.expandedIcon = expandedIcon;
 559                 this.link         = link;
 560                 this.expanded     = expanded;
 561                 this.isDynamic    = isDynamic;
 562                 this.cssClass     = cssClass;
 563                 this.linkTarget   = linkTarget;
 564                 this.n            = new Array();
 565                 this.events       = new Array();
 566                 this.handlers     = null;
 567                 this.oncollapse   = null;
 568                 this.onexpand     = null;
 569                 this.ontoggle     = null;
 570         }
 571
 572 /**
 573 * Adds a node to an already existing node
 574 */
 575         TreeNode.prototype.addItem = function (newNode)
 576         {
 577                 newIndex = this.n.length;
 578                 this.n[newIndex] = newNode;
 579
 580                 return this.n[newIndex];
 581         }
 582
 583 /**
 584 * Sets an event for this particular node
 585 */
 586         TreeNode.prototype.setEvent = function (eventName, eventHandler)
 587         {
 588                 switch (eventName.toLowerCase()) {
 589                         case 'onexpand':
 590                                 this.onexpand = eventHandler;
 591                                 break;
 592
 593                         case 'oncollapse':
 594                                 this.oncollapse = eventHandler;
 595                                 break;
 596
 597                         case 'ontoggle':
 598                                 this.ontoggle = eventHandler;
 599                                 break;
 600
 601                         default:
 602                                 this.events[eventName] = eventHandler;
 603                 }
 604         }
 605
 606 /**
 607 * That's the end of the tree classes. What follows is
 608 * the browser detection code.
 609 */
 610
 611
 612 //<!--
 613 // Ultimate client-side JavaScript client sniff. Version 3.03
 614 // (C) Netscape Communications 1999-2001.  Permission granted to reuse and distribute.
 615 // Revised 17 May 99 to add is_nav5up and is_ie5up (see below).
 616 // Revised 20 Dec 00 to add is_gecko and change is_nav5up to is_nav6up
 617 //                      also added support for IE5.5 Opera4&5 HotJava3 AOLTV
 618 // Revised 22 Feb 01 to correct Javascript Detection for IE 5.x, Opera 4,
 619 //                      correct Opera 5 detection
 620 //                      add support for winME and win2k
 621 //                      synch with browser-type-oo.js
 622 // Revised 26 Mar 01 to correct Opera detection
 623 // Revised 02 Oct 01 to add IE6 detection
 624
 625 // Everything you always wanted to know about your JavaScript client
 626 // but were afraid to ask. Creates "is_" variables indicating:
 627 // (1) browser vendor:
 628 //     is_nav, is_ie, is_opera, is_hotjava, is_webtv, is_TVNavigator, is_AOLTV
 629 // (2) browser version number:
 630 //     is_major (integer indicating major version number: 2, 3, 4 ...)
 631 //     is_minor (float   indicating full  version number: 2.02, 3.01, 4.04 ...)
 632 // (3) browser vendor AND major version number
 633 //     is_nav2, is_nav3, is_nav4, is_nav4up, is_nav6, is_nav6up, is_gecko, is_ie3,
 634 //     is_ie4, is_ie4up, is_ie5, is_ie5up, is_ie5_5, is_ie5_5up, is_ie6, is_ie6up, is_hotjava3, is_hotjava3up,
 635 //     is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
 636 // (4) JavaScript version number:
 637 //     is_js (float indicating full JavaScript version number: 1, 1.1, 1.2 ...)
 638 // (5) OS platform and version:
 639 //     is_win, is_win16, is_win32, is_win31, is_win95, is_winnt, is_win98, is_winme, is_win2k
 640 //     is_os2
 641 //     is_mac, is_mac68k, is_macppc
 642 //     is_unix
 643 //     is_sun, is_sun4, is_sun5, is_suni86
 644 //     is_irix, is_irix5, is_irix6
 645 //     is_hpux, is_hpux9, is_hpux10
 646 //     is_aix, is_aix1, is_aix2, is_aix3, is_aix4
 647 //     is_linux, is_sco, is_unixware, is_mpras, is_reliant
 648 //     is_dec, is_sinix, is_freebsd, is_bsd
 649 //     is_vms
 650 //
 651 // See http://www.it97.de/JavaScript/JS_tutorial/bstat/navobj.html and
 652 // http://www.it97.de/JavaScript/JS_tutorial/bstat/Browseraol.html
 653 // for detailed lists of userAgent strings.
 654 //
 655 // Note: you don't want your Nav4 or IE4 code to "turn off" or
 656 // stop working when new versions of browsers are released, so
 657 // in conditional code forks, use is_ie5up ("IE 5.0 or greater")
 658 // is_opera5up ("Opera 5.0 or greater") instead of is_ie5 or is_opera5
 659 // to check version in code which you want to work on future
 660 // versions.
 661
 662 /**
 663 * Severly curtailed all this as only certain elements
 664 * are required by TreeMenu, specifically:
 665 *  o is_ie4up
 666 *  o is_nav6up
 667 *  o is_gecko
 668 */
 669
 670     // convert all characters to lowercase to simplify testing
 671     var agt=navigator.userAgent.toLowerCase();
 672
 673     // *** BROWSER VERSION ***
 674     // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
 675     var is_major = parseInt(navigator.appVersion);
 676     var is_minor = parseFloat(navigator.appVersion);
 677
 678     // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
 679     // If you want to allow spoofing, take out the tests for opera and webtv.
 680     var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
 681                 && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
 682                 && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
 683     var is_nav6up = (is_nav && (is_major >= 5));
 684     var is_gecko = (agt.indexOf('gecko') != -1);
 685
 686
 687     var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
 688     var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
 689     var is_ie4up  = (is_ie && (is_major >= 4));
 690
 691         var is_opera  = (agt.indexOf("opera") != -1);
 692         var is_opera7 = is_opera && (agt.indexOf("opera 7") != -1);
 693
 694         // Patch from Harald Fielker
 695     if (agt.indexOf('konqueror') != -1) {
 696         var is_nav    = false;
 697         var is_nav6up = false;
 698         var is_gecko  = false;
 699         var is_ie     = true;
 700         var is_ie4    = true;
 701         var is_ie4up  = true;
 702     }
 703 //--> end hide JavaScript