function fCheckFields(obj,val) {
	if((obj.value == 'gebruikersnaam')||(obj.value == 'wachtwoord')) {
		obj.value = ''
	}
	else if(obj.value == '')
	{
		obj.value = val
	}
}

function fCheckValues() {
	if(mailformulier.naam.value == '') {
		alert('Vul uw naam in s.v.p.')
	} else if (mailformulier.email.value=='') {
		alert('Vul uw e-mailadres in s.v.p.');
	} else if (mailformulier.bericht.value=='') {
		alert('Vul uw bericht in s.v.p.');
	} else {
		mailformulier.submit();
	}
}

function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   myfield.form.submit();
   return false;
   }
else
   return true;
}