function checkFormEmail()
{
	errorMessage = '';
	errorFound = false;
	if (document.aanvraag.email.value == '') 
	{
		errorMessage = errorMessage + '- Geen e-mail adres ingevuld.\n';
		errorFound = true;
	} 
		else 
	{
		emailAddress = document.aanvraag.email.value;
		if (emailAddress.search("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\ .[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9])*[a-z0-9]?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])") == -1) 
		{
			errorMessage = errorMessage + '- Ongeldig e-mailadres ingevuld.\n';
			errorFound = true;
		}
	}

	if (errorFound) 
	{
		alert(errorMessage);
		return false;
	}
	
	document.aanvraag.okLink.value = "http://flevolichtenwonen.m7.mailplus.nl/form.php?email=" + document.aanvraag.email.value;
}