function openPopup (url) {
 var browserName=navigator.appName;
 if (browserName=="Microsoft Internet Explorer") {
 fenster = window.open(url, "fenster1", "width=825,height=670,status=no,scrollbars=no,resizable=yes");
 }
 else
 {
 fenster = window.open(url, "fenster1", "width=825,height=670,status=no,scrollbars=yes,resizable=yes");
 }
 fenster.focus();
}