function CheckFields(form) 
{
	if(form.naam.value == "" || form.voorletters.value == "" || form.roepnaam.value == "" || form.adres.value == "" || form.postcode.value == "" || form.woonplaats.value == "" || form.geboortedatum.value == "")		
	{
		alert("Niet alle velden zijn ingevuld");
		return false;
	}
	
	if(form.telefoon.value.length <= 9 || form.telefoon.value == "")
	{
		alert("'' " + form.telefoon.value + " '', is geen geldig telefoonnummer.");
		return false;
	}
	
	if(form.email.value.length != "")
	{
		if(form.email.value.length <= 6 || form.email.value.indexOf ('@', 0) == -1 || form.email.value.indexOf ('.', 0) == -1)
		{
			alert("'' " + form.email.value + " '', is geen geldig email adres.");
			return false;
		}
		else
		{
			form.action=("index.php?mod=form&act=save");
		}
	}
}