//javascript form validation 

	function checkform ( form )
	{
		var a = "";
		if (form.naam.value == "") {
			a += "- U bent uw naam vergeten...\n";
		}
		if (form.vanmail.value == "") {
			a += "- U bent uw email adres vergeten...\n";
		}
		if (form.adres.value == "") {
			a += "- U bent uw adres vergeten...\n";
		}
		if (form.postcode.value == "") {
			a += "- U bent uw postcode vergeten...\n";
		}
		if (form.woonplaats.value == "") {
			a += "- U bent uw woonplaats vergeten...\n";
		}
		if (form.telprive.value == "") {
			a += "- U bent uw telefoon nummer vergeten...\n";
		}
		if (a != "")
		{
			alert("Let op!!\n"+a);
			return false;
		}
		return true ;
	}