function GetExtInfo() {
	var l=200;
	var sExt=new String();
	if (screen) {
		if (screen.width && screen.colorDepth) sExt+='&s='+screen.width+'x'+screen.height+'&c='+screen.colorDepth;
	}
	sExt+="&r=";
	if(typeof Error != 'undefined') {
		eval("try {if (top && top.document && top.document.referrer) {sExt+=escape(top.document.referrer.substring(0, l))} } catch(exception) {}");
	} else if(top.document.referrer) {
		sExt+=escape(top.document.referrer.substring(0, l));
	}
	return sExt;
}