function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
	var pindex = theStr.indexOf(".",index);
	if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	if (formField.value == "")
	{
		alert('U bent vergeten ' + fieldLabel +' in te vullen.');
		formField.focus();
		result = false;
	}
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	if (required && !validRequired(formField,fieldLabel))
		result = false;
	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Het ingevulde email-adres lijkt incorrect");
		formField.focus();
		result = false;
	}
  return result;
}

function validateZoekForm(theForm)
{
	if (!validRequired(theForm.zoekterm,"de zoekterm"))
		return false;
	return true;
}

function validateForm(kassa)
{
	if (!validRequired(kassa.naam,"uw naam"))
		return false;
	if (!validRequired(kassa.straat,"de straat en huisnummer:"))
		return false;
	if (!validRequired(kassa.postcode,"uw postcode"))
		return false;
	if (!validRequired(kassa.woonplaats,"uw woonplaats"))
		return false;
	if (!validRequired(kassa.telefoonnummer,"uw telefoonnummer"))
		return false;
	if (!validEmail(kassa.emailadres,"email",true))
		return false;
	return true;
}

function validateZoekForm(kassa)
{
	if (!validRequired(kassa.zoekterm,"de zoekterm"))
		return false;
	return true;
}

function validateContinentForm(contintent)
{
	if (!validRequired(contintent.continenten,"een continent/categorie"))
		return false;
	return true;
}