asp.net mvc: Is that username available?

I been using prototype for few of my project lately, however, I been hearing some wonderful things about jquery so decided that it is the right time to give it a short. Here is what I tried to implement with jquery on asp.net mvc. I decided to add the ability to automatically check whether the username given by the user on the registration page is already taken or is available. For this I added a new action on the account controller named “check”. This action returns a ContentResult containing the text to display. Code follows: