function openFile(url) {
  	var strWidth = String(800);
  	var strHeight = String(480);
  	strXLocation = String((screen.width - 800) / 2);
  	strYLocation = String((screen.height - 480) / 2);
  	var oWin    = window.open(url, "", "status=yes,toolbar=no,resizable=yes,scrollbars=yes,location=no,menubar=yes,width=" +strWidth+ ",left="+strXLocation+",height=" +strHeight+",top="+strYLocation);
  	oWin.focus();
}