function oeffnefenster(url) {
 id = window.setTimeout(function(){oeffnefenster1(url)}, 0001);
}

function oeffnefenster1(url) {
 fenster = window.open(url,'info','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=350,height=650,left=150,top=350');
 fenster.focus();
}

function keinfenster() {
   window.clearTimeout(id);
}