function validEmail ($email) {
	
	$emailRegExp = new RegExp ('\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*([,;]\\s*\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*)*', 'g');
	
	return $emailRegExp.test ($email);
}

function validZip ($zip) {
	
	$zipRegExp = new RegExp ('^\\d{5}$', 'g');
	
	return $zipRegExp.test ($zip);
}

function validate_join_elist ($form) {
	
	if (!validEmail ($form.elements.txtEmail.value)) {
		
		alert ('Please enter a valid email address');
		$form.elements.txtEmail.focus ();
		return false;
	} else if (!validZip ($form.elements.txtZipCode.value)) {
		
		alert ('Please enter a valid five digit zipcode');
		$form.elements.txtZipCode.focus ();
		return false;
	} else {
		
		// OK to submit
		return true;
	}
}