// JavaScript Document

function popup(Datei) {
F1 = window.open(Datei,"Fenster1","width=420,height=550,left=0,top=0, scrollbars=yes");
 F1.focus();
}

<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->