function validateEmail() {
    var pattern=/^([a-zA-Z0-9_\.\-\+])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;
    if (!pattern.test($jq('#signup_email_address').val())) {
        $jq('#signup_email_address').css('border','1px solid #FF0000');
        return false;
    }
}