function bildgross(src,nam,txt) {
   if(!txt) txt=nam;
   var u="&"; // sonst meckert Tidy
   var fw=Math.floor(screen.availWidth*3/4);
   var fh=Math.floor(screen.availHeight*3/4);
   var fbild=window.open(
            "/galerie/bildgross.php?src="+src+u+"nam="+nam+u+"txt="+txt,
            "Bildgross",
            "width="+fw+",height="+fh+",top=0,left=0,"+
            "dependent=no,hotkeys=no,scrollbars=no,resizable=yes,status=no");
   fbild.focus(); }