Dojo's Formbind

dojo.require("dojo.io.*");

var x = new dojo.io.FormBind({
    formNode: "configureDirectoryForm",
    mimetype: 'text/json',
    load: function(type, data, e) {
       alert("type=" + type + "Data=" + data);
    }
});

x.onSubmit = function(form) {
   // validate form or dispaly loading msg
   return true; // need this, otherwise form won't get sent!
}

Alternatively,

dojo.io.bind({
    formNode: dojo.byId("agentCreationForm"),
    method: 'post',
    mimetype: 'text/json',
    load: function(type, data, e) {       
        alert("type=" + type + "Data=" + data.state);
        msgDialog.hide();
    },
    error: function(type, data, e) {
        alert("An error occured!");
    }
});

However, it has the limitation in form validation. It only allow client side JS validation. If we use webwork's validation framework, the response is html page with error msg rather than JSONObject string and cannot be interpreted.