function openRef(pic) {
	var ref = window.open('showref.asp?pic='+pic, 'ref','width=400,height=300, location=no,menubar=no,status=no,resizable=no,scrollbars=no');
}
function printPage() {
  if (window.print) 
    window.print();
  else
    alert("Sorry, uw browser kan niet automatisch printen.");
}