function OpenPopupWindow(url, w, h, param) {
  today = new Date();
  
  WindowName='PopupWin'+today.getTime();
  if (!param) {
   window.open(url,WindowName,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=' + w + ',height=' + h);
  } else {
   window.open(url,WindowName, + param + ',width=' + w + ',height=' + h);
  }
  return false;
}