function expandform() {
	var emailform = document.getElementById('emailform');
	if(typeof emailform.style.display == "undefined")
		emailform.style.display = "hidden";
	else {
		if(emailform.style.display == "block")
			emailform.style.display = "none";
		else
			emailform.style.display = "block";
	}
}

function checkAndSubmitForm() {
	var f = document.getElementById('email');
	var complete = true;
	for(i = 0; i < f.elements.length && complete; i++){
		var el = f.elements[i];
		if(el.type == "text")
			if(el.value == "")
				complete = false;
	}
	
	if(complete)
		f.submit();
	else {
		window.alert("U moet alle velden invullen!");
	}
		
}