function popup(data,width,height) {
    var winwidth = (screen.width - width) / 2;
    var winheight = (screen.height - height) / 2;
    Neufenster2=window.open(data,"Zweitfenster2","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,top="+winheight+",left="+winwidth+",height="+height+",width="+width); 
 		setTimeout('Neufenster2.focus();',250);
}