function validate() {
	// email check
	var emailAddrString = document.getElementById("email").value;
	if ((emailAddrString.length == 0)
		|| (emailAddrString.indexOf("@") == -1)
		|| (emailAddrString.indexOf(".") == -1)) {
		window.alert("You must enter a valid email address.");
		document.getElementById("email").focus();
		return false;
	}
	
	return true;
}