function popup (url,name){	
	weite=400;	
	hoehe=441;
	spaceleft = (screen.availWidth - weite) / 2;
    spacetop = (screen.availHeight - hoehe) / 2; 

	param="width="+weite+",height="+hoehe+",left="+spaceleft+",top="+spacetop+",scrollbars=no";
	var PopUp = window.open(url,name,param);
  	if (PopUp) PopUp.focus();
}