var newwin;

function launchwin(winurl,winname,breite,hoehe)
{
		x=(screen.width-breite)/2;
		y=(screen.height-hoehe)/2;

parameter='width='+breite+',height='+hoehe+',top='+y+',left='+x+',scrollbars=no,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
	
newwin = window.open(winurl,winname,parameter);

 		newwin.focus();
	}