Have you seen Script#? It is very impressive cross-compiler from C# to JavaScript. The libraries make it simple to program against the HTML DOM and Silverlight among other technologies. I have been using them recently to program Silverlight 1.0 without having to actually touch JavaScript. Using high-level OOP concepts makes creating complex user interactions much easier.

The Model-View-Presenter pattern has been very popular on the server-side when creating HTML applications. However, it seems that not many people have considered using it within the browser. With AJAX techniques becoming the way to make interactive web applications, it seems a little odd that people are not using more high-level concepts client-side. Of course, this mostly applies to the .NET space. I am aware there are Java toolkits that generate JavaScript.

I am therefore going to look into using Script# to implement a client-side, MVP-style, web application. The Model will contain local data and communicate with the server (via XML HTTP requests). The View will be a simple object that can get and set values from HTML/Silverlight elements and raise events when the user clicks on buttons, etc. The Presenter object will then orchestrate the user interaction logic. All this will be done within JavaScript by using Script# to convert C# classes, etc, into JavaScript concepts.

By writing all the code C#, it should be possible to tier split the Model class into server-side and client-side pieces. Whilst the JavaScript on the client-side is drastically different from the C# server-side model, they will share a common set of data fields. So it should be possible to serialize between the two worlds.