function hideNummerbehoud() {
	document.getElementById('nummerbehoudToggler').style.display = 'none';
}

function showNummerbehoud() {
	document.getElementById('nummerbehoudToggler').style.display = '';
}

function sendForm() {
	if (CheckInput()) {
		document.order.action = "sendpdf.php";
		document.order.submit();
		return true;
	}
	return false;
}

function CheckInput() {
	if(document.order.vl.value.length == 0) {
		document.order.vl.focus();
		showalert("voornaam");
		return false;
	}
	if(document.order.naam.value.length == 0) {
		document.order.naam.focus();
		showalert("naam");
		return false;
	}
	if(document.order.straatnaam.value.length == 0) {
		document.order.straatnaam.focus();
		showalert("straat");
		return false;
	}
	if(document.order.huisnr.value.length == 0) {
		document.order.huisnr.focus();
		showalert("huis nummer");
		return false;
	}
	if(document.order.postcodenr.value.length == 0) {
		document.order.postcodenr.focus();
		showalert("postcode");
		return false;
	}
	if(document.order.plaats.value.length == 0) {
		document.order.plaats.focus();
		showalert("woonplaats");
		return false;
	}
	if(document.order.telefoon.value.length == 0) {
		document.order.telefoon.focus();
		showalert("telefoon");
		return false;
	}
	if (!emailCheck (document.order.email.value)) {
		document.order.email.focus();
		return false;
	}
	return true;
}
function showalert (AlertString) {
	alert ("Het volgende veld is niet correct ingevuld:\n-" + AlertString + "-.\nProbeer het nogmaals.\nBlijft u dit probleem houden,\nneem dan contact op met de webmaster.");
	return false;
}
function emailCheck (emailStr) {
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		showalert("e-mail is ongeldig");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	if (user.match(userPat)==null) {
		showalert("e-mail is ongeldig");
		return false;
	}
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				showalert("e-mail is ongeldig");
			return false;
			}
		}
		return true;
	}
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		showalert("e-mail is ongeldig");
		return false;
	}
	var atomPat=new RegExp(atom,"g");
	var domArr=domain.match(atomPat);
	var len=domArr.length;
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) {
		showalert("e-mail is ongeldig");
		return false;
	}
	if (len<2) {
		showalert("e-mail is ongeldig");
		return false;
	}
	return true;
}