function popup(t,w,h)
{
	var target = t;

	//----> Fenster Zentrieren
	toppos	= Math.round((screen.height-h)/2);
	leftpos	= Math.round((screen.width-w)/2);
	
	//----> Fenster Aufrufen
	var paras = "screenx=0,screeny=0,top="+ toppos +",left="+ leftpos +",dependent=yes,toolbar=no,width=" + w + ",height=" + h + ",directories=no,status=no,scrollbars=yes,resizable=yes,menubar=no";
	winInfo=window.open(target,"PopupStart",paras);
	//----> Fensterfocus setzten
	winInfo.focus();
};