function oeffnefenster (url) {
var fenster = window.open(url, "fenter1", "width=500,height=600,status=yes,scrollbars=yes,resizeable=yes");
fenster.focus();
}
var win = window.open("about:blank","Progress","toolbar=no,width=200,height=100,directories=no,status=no,scrollbars=no,resize=no,menubar=no");
win.document.open();
win.document.writeln('Bitte warten ...');
win.document.writeln('
');
win.document.writeln('Lade Bilder ...
');
win.document.writeln('Bitte warten.');
win.document.writeln('');
win.document.close();