addLoadEvent(function () {
	ValidateContactUsForm();
});

function ValidateContactUsForm() {
	var form = $('contactUsForm');

	var inputFirstName = $('inputFirstName');
	var inputSurname = $('inputSurname');
	var inputEmailAddress = $('inputEmailAddress');
	var textareaComment = $('textareaComment');

	form.onsubmit = function () {
		if (!ValidateSubstance(inputFirstName, 'Please enter a first name')) return false;
		if (!ValidateSubstance(inputSurname, 'Please enter a surname')) return false;
		if (!ValidateSubstance(inputEmailAddress, 'Please enter an email address')) return false;
		if (!ValidateEmail(inputEmailAddress, 'Please enter a valid email address')) return false;
		if (!ValidateSubstance(textareaComment, 'Please enter a comment')) return false;
	};
}