var DOMReady = {

onDOMReadyHandler : function() {},

// returns true if listener is active, otherwise - false (that means that
// window.onload is used
listenDOMReady : function() {

var browser = navigator.userAgent;
var is_safari = /(safari|webkit)/i.test(browser);
var is_opera = /opera/i.test(browser);
var is_msie = /msie/i.test(browser);
var is_mozilla = /mozilla/i.test(browser) && !/(compatible|webkit)/i.test(browser);

	if (is_opera || is_mozilla){
		this.attachEvent(document, "DOMContentLoaded", this.onDOMReadyHandler);
		return true;
	}

	if (is_msie) {
		document.write('<script id="dr_ie_script" defer="true" src="javascript:;"><\/script>');
		document.getElementById("dr_ie_script").onreadystatechange = function(){
			if (this.readyState == "complete") DOMReady.onDOMReadyHandler();
		};
		return true;
	}

	if (is_safari) {
		this.domReadyTimer = window.setInterval(function(){
			if (document.readyState == "loaded" ||
				document.readyState == "complete") {

				window.clearInterval(DOMReady.domReadyTimer);
				DOMReady.onDOMReadyHandler();

			}
		}, 10);

		return true;
	}


	// use onload event otherwise
	this.attachEvent(window, "load", DOMReady.onDOMReadyHandler);

	return false;
},

// timer (used with Safari)
domReadyTimer : null,

// set event handler
attachEvent : function(obj, event, handler) {

	if (obj.addEventListener) {
		obj.addEventListener(event, handler, false);
	} else {
		if (obj.attachEvent) {
			obj.attachEvent('on'+event, handler);
		}
	}
},


// remove event handler
detachEvent : function(obj, event, handler) {

	if (obj.removeEventListener) {
		obj.removeEventListener(event, handler, false);
	} else {
		if (obj.detachEvent) {
			obj.detachEvent('on'+event, handler);
		}
	}
}

};


var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();