function isValidEmail(e) {
	var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
	var returnval=emailfilter.test(e.value)
	if (returnval==false){
		alert("Please enter a valid email address.")
		e.focus()
	}
	return returnval
}

function validateFeedbackForm() {
	var frm = document.frmFeedback;
	var email = frm.email;
	var comment = frm.comment;

	if(email.value == '') {
		alert('Please enter your email');
		email.focus();
		return false;
	}

	if (!isValidEmail(email))
		return false;

	if (comment.value.length == 0) {
		alert('Please enter your feedback/comment');
		comment.focus();
		return false;
	}

	return true;
}

function validateNewsLetterForm() {
	var frm = document.frmNewsLetter;
	var email = frm.email;

	if(email.value == '') {
		alert('Please enter your email');
		email.focus();
		return false;
	}

	if (!isValidEmail(email))
		return false;

	return true;
}

function isNumberKey(evt) {
	var charCode = (evt.which) ? evt.which : event.keyCode
	if (charCode > 31 && (charCode < 48 || charCode > 57))
	return false;

	return true;
}