function check(url, message) {
  if (message == undefined)
    message = 'Are you sure?';
  if (confirm(message))
    document.location.href=url;
}

function show_window(sid,h,w)
{

  var popup = window.open("aa", "News",'toolbar=1,location=0,directories=0,status=0,menubar=1,scrollbars=1,resizable=0,width=' + h + ',height=' + w);
  popup.location = sid;

}