使用JavaScript自定义ASP.NET服务器控件的简单示例？

I've been trying, unsuccessfully, to create a custom server control that can allow me to take advantage of ViewState and AutoPostBack. What is tricky is that my control is a combination of HTML and JavaScript. Here is a good example of what the rendered output would be (I'm using a JS library as well, hence the abbreviated example):I've been trying, unsuccessfully, to create a c