function DetectBrowser() {
	var detect = navigator.userAgent.toLowerCase();
	var pos = 0;
	
	this.isFF = this.isOpera = this.isIE = this.isNS = this.isUnknown = false;
	
	if( (pos = detect.indexOf('firefox')) != -1 ) { this.isFF = true; this.agent = 'firefox'; }
	else if( (pos = detect.indexOf('opera')) != -1 ) { this.isOpera = true; this.agent = 'opera'; }	
	else if( (pos = detect.indexOf('msie')) != -1 ) { this.isIE = true; this.agent = "msie"; } 
	else if( (pos = detect.indexOf('netscape')) != -1 ) { this.isNS = true; this.agent = 'netscape'; }
	else { this.isUnknown = true; this.agent = 'Unknown'; }
	
	if( !this.isUnknown ) {
		versionStart 	= pos + this.agent.length + 1;	
		versionEnd 		= detect.substring(versionStart,detect.length);		
		if( versionEnd.indexOf(";") != -1 ) {
			version = versionEnd.substring(0, versionEnd.indexOf(";"));
		} else {
			version = versionEnd;
		}
		this.version;
	}
	return this;
}
var _browser = DetectBrowser();


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();