function url_parm(name) {
    var regex = new RegExp( "[\\?&]"+name+"=([^&#]*)" );
    var results = regex.exec( window.location.href );
    if (!results) return null;
    else return unescape(results[1]);
}

function webmail_validation() {
    if ($F('webmail_user').blank() || $F('webmail_password').blank()) {
        webmail_feedback('Username or password blank');
        return false;
    }
    return true;
}
function webmail_errors() {
    var user = url_parm('user');
    if (user) $('webmail_user').value = user;
    var errors = url_parm('error');
    if (errors)
        webmail_feedback(errors);
}

function webmail_feedback(msg) {
    $('webmail_feedback').firstDescendant().update(msg);
	Effect.SlideDown('webmail_feedback');
}

Event.observe(window, 'load', webmail_errors);