function popup(url) {
	ok = window.open(url,'', "width=815, height=715, scrollbars=yes")
	if (ok) return false;
	else return true;
} 
/*
tc = new Image(0,1);
tc.src ="http://www.trackingcenter.de/statistic.php?id=1416&screenwidth="+screen.width+"&screenheight="+screen.height+"&colordepth="+screen.colorDepth+"&referrer="+escape(document.referrer)+"&url="+escape(document.URL);
*/