<!--
function check(frm)
{
if (frm.username.value=='')
  {
  alert("Campo 'username' obbligatorio.")
  frm.username.focus();
  return false;
  }
if (frm.username.value=='')
  {
  alert("Campo 'password' obbligatorio.")
  frm.password.focus();
  return false;
  }
return true;
}
-->