function validateEmail(id,errorID) {
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var address = document.getElementById(id).value;
	if(reg.test(address) == false) {
		document.getElementById(errorID).innerHTML = 'Het door u ingevulde emailadres is niet correct';
		return false;
	}
	else{
		document.getElementById(errorID).innerHTML = '';
		return true;
	}
}