jQuery saves files?

Hello guys, I made an HTML page using some jQuery code, this page has the function of showing the result written in HTML textarea. So I was wondering if you can put a button to save the entire contents of the textarea format .TXT is possible? Thankful.

My HTML page is this: http://ghfdhfg.forumeiros.com/h4-

Note: I'm Brazilian, if they can answer in Portuguese'll be even more grateful :D