window.dhtmlHistory = {
	initialize : function() {
		if (this.isInternetExplorer() == false) {
			return
		}
		if (historyStorage.hasKey("DhtmlHistory_pageLoaded") == false) {
			this.fireOnNewListener = false;
			this.firstLoad = true;
			historyStorage.put("DhtmlHistory_pageLoaded", true)
		} else {
			this.fireOnNewListener = true;
			this.firstLoad = false
		}
	},
	addListener : function(callback) {
		this.listener = callback;
		if (this.fireOnNewListener == true) {
			this.fireHistoryEvent(this.currentLocation);
			this.fireOnNewListener = false
		}
	},
	add : function(newLocation, historyData) {
		var self = this;
		var addImpl = function() {
			if (self.currentWaitTime > 0)
				self.currentWaitTime = self.currentWaitTime - self.WAIT_TIME;
			newLocation = self.removeHash(newLocation);
			var idCheck = document.getElementById(newLocation);
			if (idCheck != undefined || idCheck != null) {
				var message = "Exception: History locations can not have "
						+ "the same value as _any_ id's "
						+ "that might be in the document, "
						+ "due to a bug in Internet "
						+ "Explorer; please ask the "
						+ "developer to choose a history "
						+ "location that does not match "
						+ "any HTML id's in this "
						+ "document. The following ID "
						+ "is already taken and can not " + "be a location: "
						+ newLocation;
				throw message;
			}
			historyStorage.put(newLocation, historyData);
			self.ignoreLocationChange = true;
			this.ieAtomicLocationChange = true;
			self.currentLocation = newLocation;
			window.location.hash = newLocation;
			if (self.isInternetExplorer())
				self.iframe.src = "blank.html?" + newLocation;
			this.ieAtomicLocationChange = false
		};
		window.setTimeout(addImpl, this.currentWaitTime);
		this.currentWaitTime = this.currentWaitTime + this.WAIT_TIME
	},
	isFirstLoad : function() {
		if (this.firstLoad == true) {
			return true
		} else {
			return false
		}
	},
	isInternational : function() {
		return false
	},
	getVersion : function() {
		return "0.03"
	},
	getCurrentLocation : function() {
		var currentLocation = this.removeHash(window.location.hash);
		return currentLocation
	},
	currentLocation : null,
	listener : null,
	iframe : null,
	ignoreLocationChange : null,
	WAIT_TIME : 200,
	currentWaitTime : 0,
	fireOnNewListener : null,
	firstLoad : null,
	ieAtomicLocationChange : null,
	create : function() {
		var initialHash = this.getCurrentLocation();
		this.currentLocation = initialHash;
		if (this.isInternetExplorer()) {
			document.write("<iframe style='border: 0px; width: 1px; "
					+ "height: 1px; position: absolute; bottom: 0px; "
					+ "right: 0px; visibility: visible;' "
					+ "name='DhtmlHistoryFrame' id='DhtmlHistoryFrame' "
					+ "src='blank.html?" + initialHash + "'>" + "</iframe>");
			this.WAIT_TIME = 400
		}
		var self = this;
		window.onunload = function() {
			self.firstLoad = null
		};
		if (this.isInternetExplorer() == false) {
			if (historyStorage.hasKey("DhtmlHistory_pageLoaded") == false) {
				this.ignoreLocationChange = true;
				this.firstLoad = true;
				historyStorage.put("DhtmlHistory_pageLoaded", true)
			} else {
				this.ignoreLocationChange = false;
				this.fireOnNewListener = true
			}
		} else {
			this.ignoreLocationChange = true
		}
		if (this.isInternetExplorer()) {
			this.iframe = document.getElementById("DhtmlHistoryFrame")
		}
		var self = this;
		var locationHandler = function() {
			self.checkLocation()
		};
		setInterval(locationHandler, 100)
	},
	fireHistoryEvent : function(newHash) {
		var historyData = historyStorage.get(newHash);
		this.listener.call(null, newHash, historyData)
	},
	checkLocation : function() {
		if (this.isInternetExplorer() == false
				&& this.ignoreLocationChange == true) {
			this.ignoreLocationChange = false;
			return
		}
		if (this.isInternetExplorer() == false
				&& this.ieAtomicLocationChange == true) {
			return
		}
		var hash = this.getCurrentLocation();
		if (hash == this.currentLocation)
			return;
		this.ieAtomicLocationChange = true;
		if (this.isInternetExplorer() && this.getIFrameHash() != hash) {
			this.iframe.src = "blank.html?" + hash
		} else if (this.isInternetExplorer()) {
			return
		}
		this.currentLocation = hash;
		this.ieAtomicLocationChange = false;
		this.fireHistoryEvent(hash)
	},
	getIFrameHash : function() {
		var historyFrame = document.getElementById("DhtmlHistoryFrame");
		var doc = historyFrame.contentWindow.document;
		var hash = new 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) {
		if (hashValue == null || hashValue == undefined)
			return null;
		else if (hashValue == "")
			return "";
		else if (hashValue.length == 1 && hashValue.charAt(0) == "#")
			return "";
		else if (hashValue.length > 1 && hashValue.charAt(0) == "#")
			return hashValue.substring(1);
		else
			return hashValue
	},
	iframeLoaded : function(newLocation) {
		if (this.ignoreLocationChange == true) {
			this.ignoreLocationChange = false;
			return
		}
		var hash = new String(newLocation.search);
		if (hash.length == 1 && hash.charAt(0) == "?")
			hash = "";
		else if (hash.length >= 2 && hash.charAt(0) == "?")
			hash = hash.substring(1);
		if (this.pageLoadEvent != true) {
			window.location.hash = hash
		}
		this.fireHistoryEvent(hash)
	},
	isInternetExplorer : function() {
		var userAgent = navigator.userAgent.toLowerCase();
		if (document.all && userAgent.indexOf('msie') != -1) {
			return true
		} else {
			return false
		}
	}
};
window.historyStorage = {
	debugging : false,
	storageHash : new Object(),
	hashLoaded : false,
	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)
			return null;
		else
			return value
	},
	remove : function(key) {
		this.assertValidKey(key);
		this.loadHashTable();
		delete this.storageHash[key];
		this.saveHashTable()
	},
	reset : function() {
		this.storageField.value = "";
		this.storageHash = new Object()
	},
	hasKey : function(key) {
		this.assertValidKey(key);
		this.loadHashTable();
		if (typeof this.storageHash[key] == "undefined")
			return false;
		else
			return true
	},
	isValidKey : function(key) {
		if (typeof key != "string")
			key = key.toString();
		var matcher = /^[a-zA-Z0-9_ \!\@\#\$\%\^\&\*\(\)\+\=\:\;\,\.\/\?\|\\\~\{\}\[\]]*$/;
		return matcher.test(key)
	},
	storageField : null,
	init : function() {
		var styleValue = "position: absolute; top: -1000px; left: -1000px;";
		if (this.debugging == true) {
			styleValue = "width: 30em; height: 30em;"
		}
		var newContent = "<form id='historyStorageForm' " + "method='GET' "
				+ "style='" + styleValue + "'>"
				+ "<textarea id='historyStorageField' " + "style='"
				+ styleValue + "'" + "left: -1000px;' "
				+ "name='historyStorageField'></textarea>" + "</form>";
		document.write(newContent);
		this.storageField = document.getElementById("historyStorageField")
	},
	assertValidKey : function(key) {
		if (this.isValidKey(key) == false) {
			throw "Please provide a valid key for "
					+ "window.historyStorage, key= " + key;
		}
	},
	loadHashTable : function() {
		if (this.hashLoaded == false) {
			var serializedHashTable = this.storageField.value;
			if (serializedHashTable != "" && serializedHashTable != null) {
				this.storageHash = eval('(' + serializedHashTable + ')')
			}
			this.hashLoaded = true
		}
	},
	saveHashTable : function() {
		this.loadHashTable();
		var serializedHashTable = JSON.stringify(this.storageHash);
		this.storageField.value = serializedHashTable
	}
};
Array.prototype.______array = '______array';
var JSON = {
	org : 'http://www.JSON.org',
	copyright : '(c)2005 JSON.org',
	license : 'http://www.crockford.com/JSON/license.html',
	stringify : function(arg) {
		var c, i, l, s = '', v;
		switch (typeof arg) {
		case 'object':
			if (arg) {
				if (arg.______array == '______array') {
					for (i = 0; i < arg.length; ++i) {
						v = this.stringify(arg[i]);
						if (s) {
							s += ','
						}
						s += v
					}
					return '[' + s + ']'
				} else if (typeof arg.toString != 'undefined') {
					for (i in arg) {
						v = arg[i];
						if (typeof v != 'undefined' && typeof v != 'function') {
							v = this.stringify(v);
							if (s) {
								s += ','
							}
							s += this.stringify(i) + ':' + v
						}
					}
					return '{' + s + '}'
				}
			}
			return 'null';
		case 'number':
			return isFinite(arg) ? String(arg) : 'null';
		case 'string':
			l = arg.length;
			s = '"';
			for (i = 0; i < l; i += 1) {
				c = arg.charAt(i);
				if (c >= ' ') {
					if (c == '\\' || c == '"') {
						s += '\\'
					}
					s += c
				} else {
					switch (c) {
					case '\b':
						s += '\\b';
						break;
					case '\f':
						s += '\\f';
						break;
					case '\n':
						s += '\\n';
						break;
					case '\r':
						s += '\\r';
						break;
					case '\t':
						s += '\\t';
						break;
					default:
						c = c.charCodeAt();
						s += '\\u00' + Math.floor(c / 16).toString(16)
								+ (c % 16).toString(16)
					}
				}
			}
			return s + '"';
		case 'boolean':
			return String(arg);
		default:
			return 'null'
		}
	},
	parse : function(text) {
		var at = 0;
		var ch = ' ';
		function error(m) {
			throw {
				name : 'JSONError',
				message : m,
				at : at - 1,
				text : text
			}
		}
		function next() {
			ch = text.charAt(at);
			at += 1;
			return ch
		}
		function white() {
			while (ch != '' && ch <= ' ') {
				next()
			}
		}
		function str() {
			var i, s = '', t, u;
			if (ch == '"') {
				outer: while (next()) {
					if (ch == '"') {
						next();
						return s
					} else if (ch == '\\') {
						switch (next()) {
						case 'b':
							s += '\b';
							break;
						case 'f':
							s += '\f';
							break;
						case 'n':
							s += '\n';
							break;
						case 'r':
							s += '\r';
							break;
						case 't':
							s += '\t';
							break;
						case 'u':
							u = 0;
							for (i = 0; i < 4; i += 1) {
								t = parseInt(next(), 16);
								if (!isFinite(t)) {
									break outer
								}
								u = u * 16 + t
							}
							s += String.fromCharCode(u);
							break;
						default:
							s += ch
						}
					} else {
						s += ch
					}
				}
			}
			error("Bad string")
		}
		function arr() {
			var a = [];
			if (ch == '[') {
				next();
				white();
				if (ch == ']') {
					next();
					return a
				}
				while (ch) {
					a.push(val());
					white();
					if (ch == ']') {
						next();
						return a
					} else if (ch != ',') {
						break
					}
					next();
					white()
				}
			}
			error("Bad array")
		}
		function obj() {
			var k, o = {};
			if (ch == '{') {
				next();
				white();
				if (ch == '}') {
					next();
					return o
				}
				while (ch) {
					k = str();
					white();
					if (ch != ':') {
						break
					}
					next();
					o[k] = val();
					white();
					if (ch == '}') {
						next();
						return o
					} else if (ch != ',') {
						break
					}
					next();
					white()
				}
			}
			error("Bad object")
		}
		function num() {
			var n = '', v;
			if (ch == '-') {
				n = '-';
				next()
			}
			while (ch >= '0' && ch <= '9') {
				n += ch;
				next()
			}
			if (ch == '.') {
				n += '.';
				while (next() && ch >= '0' && ch <= '9') {
					n += ch
				}
			}
			if (ch == 'e' || ch == 'E') {
				n += 'e';
				next();
				if (ch == '-' || ch == '+') {
					n += ch;
					next()
				}
				while (ch >= '0' && ch <= '9') {
					n += ch;
					next()
				}
			}
			v = +n;
			if (!isFinite(v)) {
				error("Bad number")
			} else {
				return v
			}
		}
		function word() {
			switch (ch) {
			case 't':
				if (next() == 'r' && next() == 'u' && next() == 'e') {
					next();
					return true
				}
				break;
			case 'f':
				if (next() == 'a' && next() == 'l' && next() == 's'
						&& next() == 'e') {
					next();
					return false
				}
				break;
			case 'n':
				if (next() == 'u' && next() == 'l' && next() == 'l') {
					next();
					return null
				}
				break
			}
			error("Syntax error")
		}
		function val() {
			white();
			switch (ch) {
			case '{':
				return obj();
			case '[':
				return arr();
			case '"':
				return str();
			case '-':
				return num();
			default:
				return ch >= '0' && ch <= '9' ? num() : word()
			}
		}
		return val()
	}
};