function track()
{
		page=document.URL.toString();
		referrer=document.referrer;    
		if (top.document.location == document.referrer || (document.referrer == "" && top.document.location != "")) 
		{
			referrer=top.document.referrer;
		}            
		os=navigator.userAgent;
		browser=navigator.appName;
		version=navigator.appVersion;
		lang1=navigator.language;
		lang2=navigator.systemLanguage;
		if (navigator.appVersion.substring(0,1) > "3") 
      	{
      		getTime = new Date();
      		color=screen.colorDepth;
      		screenx=screen.width;
      		screeny=screen.height;
      		timezone=getTime.getTimezoneOffset();
			var myURL="http://cgi.sfu.ca/~cfrj/cgi-bin/tracker/track.php?ref="+escape(referrer)+"&page="+escape(page)+"&os="+escape(os)+"&browser="+escape(browser)+"&version="+escape(version)+"&lang1="+escape(lang1)+"&lang2="+escape(lang2)+"&color="+color+"&screenx="+screenx+"&screeny="+screeny+"&timezone="+timezone;
      	}
      	else
      	{
			var myURL="http://cgi.sfu.ca/~cfrj/cgi-bin/tracker/track.php?ref="+escape(referrer)+"&page="+escape(page)+"&os="+escape(os)+"&browser="+escape(browser)+"&version="+escape(version)+"&lang1="+escape(lang1)+"&lang2="+escape(lang2);
      	}
        var img = document.createElement('IMG');
        img.setAttribute('src', myURL);
		document.body.appendChild(img);
		document.body.removeChild(img);
}