function popup(URL,width,height) {
  var winContact = null;
  if (!winContact || winContact.closed)
  {
	  winContact = window.open(URL, 
                          'script', 
	                      'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width='+width+',height='+height+',left = 60,top = 60');

      winContact.focus();
  }
  else
  {
      winContact.focus();
  }
}