function checkform(f)
  {
  if(f.nome.value == '')
    {
    alert('Insert your name');
    f.nome.focus();
    return false;
    }
  if(f.cognome.value == '')
    {
    alert('Insert your surname');
    f.cognome.focus();
    return false;
    }
  if(f.nascita.value == '')
    {
    alert('Insert your date fo birth');
    f.nascita.focus();
    return false;
    }
  if(f.domicilio.value == '')
    {
    alert('Insert your address');
    f.domicilio.focus();
    return false;
    }
  if(f.telefono.value == '')
    {
    alert('Insert your telephone');
    f.telefono.focus();
    return false;
    }
  if(f.email.value == '')
    {
    alert('Insert your email');
    f.email.focus();
    return false;
    }		
  if(f.email.value.search(/^([\w\.\-])+@(([\w\-]{2,})+\.)+([a-z0-9]{2,})+$/i) == -1)
    {
    alert('Email format not correct');
	f.email.focus();
    return false;
    }

  if(f.libero.value == '')
    {
    alert('Insert if you are available right now');
    f.libero.focus();
    return false;
    }
  if(f.attivita.value == '')
    {
    alert('Insert duties that you are good at');
    f.attivita.focus();
    return false;
    }
  if(f.esperienze.value == '')
    {
    alert('Insert your past professional experiences');
    f.esperienze.focus();
    return false;
    }	
  if(f.lingue.value == '')
    {
    alert('Insert the languages known and the level');
    f.lingue.focus();
    return false;
    }
  if(f.conoscenze.value == '')
    {
    alert('Insert your computer knowledge');
    f.conoscenze.focus();
    return false;
    }			
  if(f.vericode.value != '')
    {
    alert('Insert the spam control code that appears in the red box below');
    f.vericode.focus();
    return false;
    }
  return true;
}