window.dhtmlHistory = {isIE: false,isOpera: false,isSafari: false,isKonquerer: false,isGecko: false,isSupported: false,create: function(options) {var that = this;  /*set user-agent flags*/var UA = navigator.userAgent.toLowerCase();var platform = navigator.platform.toLowerCase();var vendor = navigator.vendor || "";if (vendor === "KDE") {this.isKonqueror = true;this.isSupported = false;} else if (typeof window.opera !== "undefined") {this.isOpera = true;this.isSupported = true;} else if (typeof document.all !== "undefined") {this.isIE = true;this.isSupported = true;} else if (vendor.indexOf("Apple Computer, Inc.") > -1) {this.isSafari = true;this.isSupported = (platform.indexOf("mac") > -1);} else if (UA.indexOf("gecko") != -1) {this.isGecko = true;this.isSupported = true;}  window.historyStorage.setup(options);  if (this.isSafari) {this.createSafari();} else if (this.isOpera) {this.createOpera();}var initialHash = this.getCurrentLocation();  this.currentLocation = initialHash;  if (this.isIE) {this.createIE(initialHash);}  var unloadHandler = function() {that.firstLoad = null;};this.addEventListener(window,'unload',unloadHandler); if (this.isIE) {this.ignoreLocationChange = true;} else {if (!historyStorage.hasKey(this.PAGELOADEDSTRING)) {this.ignoreLocationChange = true;this.firstLoad = true;historyStorage.put(this.PAGELOADEDSTRING, true);} else {this.ignoreLocationChange = false;this.fireOnNewListener = true;}}var locationHandler = function() {that.checkLocation();};setInterval(locationHandler, 100);}, initialize: function() {if (this.isIE) {if (!historyStorage.hasKey(this.PAGELOADEDSTRING)) {this.fireOnNewListener = false;this.firstLoad = true;historyStorage.put(this.PAGELOADEDSTRING, true);}else {this.fireOnNewListener = true;this.firstLoad = false; }}},  addListener: function(listener) {this.listener = listener;if (this.fireOnNewListener) {this.fireHistoryEvent(this.currentLocation);this.fireOnNewListener = false;}},addEventListener: function(o,e,l) {if (o.addEventListener) {o.addEventListener(e,l,false);} else if (o.attachEvent) {o.attachEvent('on'+e,function() {l(window.event);});}},add: function(newLocation, historyData) {if (this.isSafari) {newLocation = this.removeHash(newLocation);  historyStorage.put(newLocation, historyData);  this.currentLocation = newLocation;window.location.hash = newLocation;this.putSafariState(newLocation);  } else {var that = this;var addImpl = function() {  if (that.currentWaitTime > 0) {that.currentWaitTime = that.currentWaitTime - that.waitTime;}newLocation = that.removeHash(newLocation);  if (document.getElementById(newLocation) && that.debugMode) {var e = "Exception: History locations can not have the same value as _any_ IDs that might be in the document,"+ " due to a bug in IE; please ask the developer to choose a history location that does not match any HTML"+ " IDs in this document. The following ID is already taken and cannot be a location: " + newLocation;throw new Error(e); }  historyStorage.put(newLocation, historyData);that.ignoreLocationChange = true;that.ieAtomicLocationChange = true;that.currentLocation = newLocation;window.location.hash = newLocation;if (that.isIE) {that.iframe.src = "blank.htm?" + newLocation;}that.ieAtomicLocationChange = false;};window.setTimeout(addImpl, this.currentWaitTime);this.currentWaitTime = this.currentWaitTime + this.waitTime;}},isFirstLoad: function() {return this.firstLoad;},getVersion: function() {return "0.6";},getCurrentLocation: function() {var r = (this.isSafari? this.getSafariState(): this.getCurrentHash());return r;},getCurrentHash: function() {var r = window.location.href;var i = r.indexOf("#");return (i >= 0? r.substr(i+1): "");},PAGELOADEDSTRING: "DhtmlHistory_pageLoaded",listener: null,waitTime: 200,currentWaitTime: 0,  currentLocation: null,  iframe: null,  safariHistoryStartPoint: null,safariStack: null,safariLength: null,  ignoreLocationChange: null,fireOnNewListener: null,firstLoad: null,ieAtomicLocationChange: null,createIE: function(initialHash) {var styles = (historyStorage.debugMode? 'width: 800px;height:80px;border:1px solid black;': historyStorage.hideStyles);var iframeID = "rshHistoryFrame";var iframeHTML = '<iframe frameborder="0" id="' + iframeID + '" style="' + styles + '" src="blank.htm?' + initialHash + '"></iframe>';document.write(iframeHTML);this.iframe = document.getElementById(iframeID);},createOpera: function() {this.waitTime = 400;var imgHTML = '<img src="javascript:location.href=\'javascript:dhtmlHistory.checkLocation();\';" style="' + historyStorage.hideStyles + '" />';document.write(imgHTML);},createSafari: function() {var formID = "rshSafariForm";var stackID = "rshSafariStack";var lengthID = "rshSafariLength";var formStyles = historyStorage.debugMode ? historyStorage.showStyles : historyStorage.hideStyles;var inputStyles = (historyStorage.debugMode? 'width:800px;height:20px;border:1px solid black;margin:0;padding:0;': historyStorage.hideStyles);var safariHTML = '<form id="' + formID + '" style="' + formStyles + '">'+ '<input type="text" style="' + inputStyles + '" id="' + stackID + '" value="[]"/>'+ '<input type="text" style="' + inputStyles + '" id="' + lengthID + '" value=""/>'+ '</form>';document.write(safariHTML);this.safariStack = document.getElementById(stackID);this.safariLength = document.getElementById(lengthID);if (!historyStorage.hasKey(this.PAGELOADEDSTRING)) {this.safariHistoryStartPoint = history.length;this.safariLength.value = this.safariHistoryStartPoint;} else {this.safariHistoryStartPoint = this.safariLength.value;}},getSafariStack: function() {var r = this.safariStack.value;return historyStorage.fromJSON(r);},  getSafariState: function() {var stack = this.getSafariStack();var state = stack[history.length - this.safariHistoryStartPoint - 1];return state;}, putSafariState: function(newLocation) {var stack = this.getSafariStack();stack[history.length - this.safariHistoryStartPoint] = newLocation;this.safariStack.value = historyStorage.toJSON(stack);},  fireHistoryEvent: function(newHash) {var historyData = historyStorage.get(newHash);this.listener.call(null, newHash, historyData);},checkLocation: function() {if (!this.isIE && this.ignoreLocationChange) {this.ignoreLocationChange = false;return;}  if (!this.isIE && this.ieAtomicLocationChange) {return;}var hash = this.getCurrentLocation();  if (hash == this.currentLocation) {return;}this.ieAtomicLocationChange = true;  if (this.isIE && this.getIframeHash() != hash) {this.iframe.src = "blank.htm?" + hash;}else if (this.isIE) {return;}  this.currentLocation = hash;  this.ieAtomicLocationChange = false;  this.fireHistoryEvent(hash);},  /*Private: Get the current location of IE's hidden iframe.*/getIframeHash: function() {var doc = this.iframe.contentWindow.document;var hash = String(doc.location.search);if (hash.length == 1 && hash.charAt(0) == "?") {hash = "";}else if (hash.length >= 2 && hash.charAt(0) == "?") {hash = hash.substring(1);}return hash;},  removeHash: function(hashValue) {var r;if (hashValue === null || hashValue === undefined) {r = null;}else if (hashValue === "") {r = "";}else if (hashValue.length == 1 && hashValue.charAt(0) == "#") {r = "";}else if (hashValue.length > 1 && hashValue.charAt(0) == "#") {r = hashValue.substring(1);}else {r = hashValue;}return r;},  iframeLoaded: function(newLocation) {if (this.ignoreLocationChange) {this.ignoreLocationChange = false;return;}  var hash = String(newLocation.search);if (hash.length == 1 && hash.charAt(0) == "?") {hash = "";}else if (hash.length >= 2 && hash.charAt(0) == "?") {hash = hash.substring(1);}window.location.hash = hash;  this.fireHistoryEvent(hash);} }; window.historyStorage = {setup: function(options) {if (typeof options !== "undefined") {if (options.debugMode) {this.debugMode = options.debugMode;}if (options.toJSON) {this.toJSON = options.toJSON;}if (options.fromJSON) {this.fromJSON = options.fromJSON;}} var formID = "rshStorageForm";var textareaID = "rshStorageField";var formStyles = this.debugMode ? historyStorage.showStyles : historyStorage.hideStyles;var textareaStyles = (historyStorage.debugMode? 'width: 800px;height:80px;border:1px solid black;': historyStorage.hideStyles);var textareaHTML = '<form id="' + formID + '" style="' + formStyles + '">'+ '<textarea id="' + textareaID + '" style="' + textareaStyles + '"></textarea>'+ '</form>';document.write(textareaHTML);this.storageField = document.getElementById(textareaID);if (typeof window.opera !== "undefined") {this.storageField.focus();}},put: function(key, value) {this.assertValidKey(key);if (this.hasKey(key)) {this.remove(key);}this.storageHash[key] = value;this.saveHashTable();},get: function(key) {this.assertValidKey(key);this.loadHashTable();var value = this.storageHash[key];if (value === undefined) {value = null;}return value;},remove: function(key) {this.assertValidKey(key);this.loadHashTable();delete this.storageHash[key];this.saveHashTable();},  /*Public: Clears out all saved data.*/reset: function() {this.storageField.value = "";this.storageHash = {};},  /*Public*/hasKey: function(key) {this.assertValidKey(key);/*make sure the hash table has been loaded from the form*/this.loadHashTable();return (typeof this.storageHash[key] !== "undefined");},  isValidKey: function(key) {return (typeof key === "string");},showStyles: 'border:0;margin:0;padding:0;',hideStyles: 'left:-1000px;top:-1000px;width:1px;height:1px;border:0;position:absolute;',debugMode: false,storageHash: {},  hashLoaded: false,   storageField: null,  assertValidKey: function(key) {var isValid = this.isValidKey(key);if (!isValid && this.debugMode) {throw new Error("Please provide a valid key for window.historyStorage. Invalid key = " + key + ".");}},loadHashTable: function() {if (!this.hashLoaded) { var serializedHashTable = this.storageField.value;if (serializedHashTable !== "" && serializedHashTable !== null) {this.storageHash = this.fromJSON(serializedHashTable);this.hashLoaded = true;}}},saveHashTable: function() {this.loadHashTable();var serializedHashTable = this.toJSON(this.storageHash);this.storageField.value = serializedHashTable;},toJSON: function(o) {return o.toJSONString();},fromJSON: function(s) {return s.parseJSON();}};