function oeffnefenster (url) {
 fenster = window.open(url, "kontaktfenster", 

"width=360,height=490,status=yes,scrollbars=no,resizable=yes");
 fenster.focus();
}
function oeffnefensterblank (url) {
 fenster = window.open(url, "_blank", 

"width=360,height=490,status=yes,scrollbars=no,resizable=yes");
 fenster.focus();
}
function top() {
self.focus();
window.setTimeout("top()",3000); 
}