function verzend_form() {
	var form = document.contact;
	var place = form.email.value.indexOf("@",1);
	var point = form.email.value.indexOf(".",place+1);
	
	if (form.naam.value == "") {
		form.naam.value = 'Geef hier je naam...';
		form.naam.style.color = '#f00';
		return false;
	} else if (form.email.value == "") {
		form.email.value = 'Geef een geldig e-mail adres...';
		form.email.style.color = '#f00';
		return false;
	} else {
		if ((place > -1)&&(form.email.value.length >2)&&(point > 1)){
			form.submit();
			return true;
		} else {
		form.email.value = 'Geef een geldig e-mail adres...';
		form.email.style.color = '#f00';
			return false;
		}
	}
}

function toggle(myItem, className){

	//hide the others
	var ps = document.getElementsByTagName('div');
	for(var i = 0; i < ps.length; i++ ) {
		if(ps[i].className == className) ps[i].style.display = "none";
	}

	//this is the ID of the hidden item
	var myItem = document.getElementById(myItem);
	//show it
	myItem.style.display = "block";
}