[jQuery] netvibes type sign in plugin

Hi all,
I want to know whether we have anything like http://www.netvibes.com/#General
sign in form thing. I mean to say that I want to create a form which
comes into focus when the user clicks a button and the background
fades. They are using mootools but I want to use jquery.
Thanks,
Gaurav
P.S. - Jquery rocks.