var oContactUsForm;

window.onload = function() {
	setFormFields();
}

function setFormFields() {
	oContactUsForm = document.forms["contact_us_form"];
	if (oContactUsForm) {
		oContactUsForm.onsubmit = function() { return validateContactUs(this); }
	}
}

function validateContactUs(frm) {
	var errMsg = "";
	errMsg += isEmailName(frm.elements["contact[name]"]);
	errMsg += isEmail(frm.elements["contact[email]"]);
	errMsg += isEmailSubject(frm.elements["contact[subject]"]);
	errMsg += isEmailMessage(frm.elements["contact[message]"]);
	if (errMsg.length > 0) {
		alert(errMsg);
		return false;
	} else {
		return true;
	}
}