/* ShowImage: References */
function showreference(ref) {
    docpop = window.open("/de/reference.php?ref="+ref, "reference", "height=600,width=800,left=20,top=20,scrollbars=no,resizable=no,toolbar=no,status=no,menubar=no");
    if (docpop) {
      docpop.focus();
      return false;
    } else { return true; }
}