/**
 * validate.js 
 */
function isNotEmpty(elem) {
	var str = elem.value;
	var re = /.+/;
	if(!str.match(re)) {
		alert("Please fill in the required field.");
		return false;
	} else {
		return true;
	}
}
function isEMailAddr(elem) {
	var str = elem.value;
	var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
	if(!str.match(re)) {
		alert("Verify the email address format.");
		return false;
	} else {
		return true;
	}
}
function validateForm(form) {
	if (isNotEmpty(form.FName)) {
		if (isNotEmpty(form.LName)) {
			if (isNotEmpty(form.Email)) {
				if (isEMailAddr(form.Email)) {
					return true;
				}	
			}
		}
	}
	return false;
}