function doLogin() {
	if(validateLogin(document.loginform)) {
		document.loginform.submit();
	}
}
function validateLogin(theForm) {
	if(theForm.user_name.value=="" || theForm.password.value=="") {
		alert("Gelieve login en paswoord in te vullen.");
		return false;
	}
	return true;
}
function loginError() {
	alert("Verkeerde login en/of paswoord");
}