function mm_open_img_window(img_url) {
  verStr=navigator.appVersion, app=navigator.appName, version = parseFloat(verStr);
  if (app.indexOf('Netscape') !=-1) {
    attribstring = "dependent=yes,locationbar=no,menubar=no,status=no,resizable=yes,width=100,height=100,scrollbars=yes"
    xOffset = 16; yOffset = 16;
 } else if (app.indexOf('Microsoft') != -1) {
    attribstring = "dependent=yes,locationbar=no,menubar=no,status=no,resizable=yes,width=100,height=100,scrollbars=yes"
    xOffset = 50;yOffset = 62;
 } else {
   attribstring = "dependent=yes,locationbar=no,menubar=no,status=no,resizable=yes,width=100,height=100,scrollbars=yes"
   xOffset = 16;yOffset = 16;
 }
 F1 = open(img_url,"BildFenster",attribstring);
 window.setTimeout("F1.resizeTo(F1.document.images[0].width+"+xOffset+",F1.document.images[0].height+"+yOffset+");F1.focus();",1000);
 window.setTimeout("F1.resizeTo(F1.document.images[0].width+"+xOffset+",F1.document.images[0].height+"+yOffset+");F1.focus();",2000);
 window.setTimeout("F1.resizeTo(F1.document.images[0].width+"+xOffset+",F1.document.images[0].height+"+yOffset+");F1.focus();",3000);
 window.setTimeout("F1.resizeTo(F1.document.images[0].width+"+xOffset+",F1.document.images[0].height+"+yOffset+");F1.focus();",4000);
 F1.focus();
};