Request.QueryString for Javascript
This is a stunningly useful Javascript library. With Ajax, I am working more now on the client-side than before, which is weird! But some Javascript stuff are not easy to do, this is where you see that ASP.NET is really powerful.
I found this little gem bvery useful in taking the same Request.Querystring features from .Net adapted to Javascript.
Read more and download here (freeware).