Checking from browser

 Hi all,

 I´m developing a web service which use a browser in the client. Someone told 
me there are tools ("jpfire" or something like this) with which you can test 
your application defining a script. I suppose that script refills the page in 
the browser and throw events.

I'm looking for this kind of software, and I would like to know what your 
opinion is about.


Thank you so much.
Cheers.