function _countDuration(){
	if(document.getElementById){
		var d;
		if(d=document.getElementById('trackingImg')){
			d.src = 'http://www1.ernst-marten.nl/visit.php?duration=y&i='+(Math.random()*Math.random());
		}
	}
}
var BrowserDetect = {
	init:function(){
		this.browser 	= this.searchString(this.dataBrowser) || '';
		this.version 	= this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || '';
		this.OS 		= this.searchString(this.dataOS) || '';
		this.language 	= ((navigator.language)?navigator.language:navigator.userLanguage) || '';
		this.referrer 	= document.referrer || '';
		this.host 		= window.location.host;
		this.protocol 	= window.location.protocol;
		this.screenWidth = screen.width;
		this.screenHeight = screen.height;

		var d = document.createElement('img');
		d.width = 1;
		d.height = 1;
		d.alt = '';
		d.id = 'trackingImg';
		d.src = 'http://www1.ernst-marten.nl/visit.php?browser='+escape(this.browser)+'&version='+escape(this.version)+'&os='+escape(this.OS)+'&language='+escape(this.language)+'&referrer='+escape(this.referrer)+'&page='+escape(window.location.href)+'&host='+escape(this.host)+'&protocol='+escape(this.protocol)+'&swidth='+this.screenWidth+'&sheight='+this.screenHeight+'&i='+(Math.random()*Math.random());
		if(document.body){
			document.body.appendChild(d);
			setInterval('_countDuration()',5000);
		}
	},
	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: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			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"
		},
		{
			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"
		},
		{
			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.userAgent,
			   subString: "iPhone",
			   identity: "iPhone/iPod"
	    },
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]
};
BrowserDetect.init();