I want to write an HttpHandler to redirect traffic to various webpages on the server.
The user will type in `http://www.thisissupposedtoberedirected.com/site12` and should be redirected to the appropiate site, in this example site version 1.2

I know how to program in ASP.NET and C# but I don't seem to grab the finer detail about website management.  

How can I manage to get this done? What should I do in the web.config? I've read this [msdn page](http://msdn.microsoft.com/en-us/library/f3ff8w4a(v=VS.71).aspx) but it isn't much help.