function showAuth() {
    document.getElementById('authImageBlank').style.display = 'none';
    document.getElementById('authImage').style.display = 'block';
    document.getElementById('authForm').style.display = 'block';
    document.getElementById('authRequest').style.display = 'block';
}

function hideAuth() {
    document.getElementById('authImageBlank').style.display = 'block';
    document.getElementById('authImage').style.display = 'none';
    document.getElementById('authForm').style.display = 'none';
    document.getElementById('authRequest').style.display = 'none';
}

function sendAuthEmail() {
    
    // send ajax request - validation + mail
    new Ajax.Request('ajaxrequest.php',
    {
        method:'post',
        parameters:$('authRequest').serialize(),
        onSuccess: function(transport){
            var response = transport.responseText;
            if (response == 'OK')
            {
                document.getElementById('authImage').style.display = 'none';
                document.getElementById('authForm').style.display = 'none';
                document.getElementById('requestIframe').style.display = 'block';
                
                // set height iframe
                document.getElementById('iframeRequest').style.height = '520px';
                
            } else {
                alert(response);
            }
        },
        onFailure: function(){ alert('Something went wrong...') }
    });
    
    return false;
}