function subscribe (email) {
    
    var url = "/index/subscribe";
        
    dojo.xhrPost( {
        url: url,
        postData: "email=" + email,
        handleAs: "text",
        load: function(response) {
            dojo.byId('subscribeMsg').innerHTML = response;
            dojo.byId('subscribeMsg').style.display = 'block';
        }
    } );
}