function atualizar()
{
   if(document.getElementById('u').checked)
   {
      document.getElementById("domains").value = "ufg.br";
	  document.getElementById("sitesearch").value = "ufg.br";
   }
   
   if(document.getElementById('w').checked)
   {
      document.getElementById("domains").value = "";
	  document.getElementById("sitesearch").value = "";
   }
}