function MM_openBrWindow(theURL,winName,features,width,height) {
  if ( features.length > 0) {
   features += ",";
   }
 var myWin = window.open(theURL,winName,features + "width=" + width + ",height=" + height + ",left=" + ((screen.width - width) / 2) + ",top=" + ((screen.height - height) / 2));
  myWin.focus();
 }