var URL;
var Title;
var myWidth;
var myHeight;
var Variabelen; 
function NieuwVenster(URL,Title,myWidth,myHeight) 
{ Variabelen="width=" + myWidth + ",height=" + myHeight + ",top=50,left=50,scrollbars=no,menubar=no";
  window.open(URL, Title, Variabelen);}