function count(user_id,modus,invisible)
{
	var imgurl="http://server.lutz-development.de/~manager/counter.php?user_id="+user_id;
	var s=screen;
	var s_w=s.width;
	var s_h=s.height;
	var s_d=s.colorDepth;
	var r;
	if(s_w) imgurl+="&s_w="+s_w;
	if(s_h) imgurl+="&s_h="+s_h;
	if(s_d) imgurl+="&s_d="+s_d;
	if(modus=="direkt")r=document.referrer;
	else r=top.document.referrer;
	imgurl+="&r="+r;
	if(invisible==1)
	{
		imgurl+="&modus=invisible";
		document.write('<img src="'+imgurl+'" width="0" height="0" border="0" nosave />');		
	}
	else
	{
		document.write('<img src="'+imgurl+'" width="18" height="18" border="0" nosave />');
	}
}