I came across jQuery on the web already several times, but I never took a deep look at it. Now some days ago, Scott Guthrie posted some steps on his blog that show you how to add Intellisense support jo jQuery inside Visual Studio (and also the Express Editions). So take a look at it, it's quite interesting...
That was the outcome of my try, in just 3 minute it was working:
Here's a related link to Peter's blog where he points out "how to set the focus to the username textbox of asp:LoginView