var mypage;
function popUp(URL,w,h) {
  var winl = (screen.width - w) / 2;
  var wint = (screen.height - h) / 2;
  mypage = window.open(URL, 'poped', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,top='+wint+',left='+winl+',resizable=0,width='+w+',height='+ h);
  mypage.focus();
}