addLoadEvent(function () {
	validateNewsletterUnsubscribeForm();
});

function validateNewsletterUnsubscribeForm() {
	var form = $('newsletterUnsubscribe_form');
	var inputEmailAddress = $('inputEmailAddress');

	if (!form) return;

	form.onsubmit = function () {
		if (!validate(inputEmailAddress, 'Please enter an email address', hasSubstance(inputEmailAddress.value))) return false;
		if (!validate(inputEmailAddress, 'Please enter a valid email address. It should resemble "name@company.com"', isEmailAddress(inputEmailAddress.value))) return false;
	};
}