JavaScript code to display Twitter created_at as xxxx ago

I need some JS code that will take the created_at value from a Twitter feed and display it as xxxx ago. I can find examples of creating the xxxx ago bit but not examples of getting the created_at bit into the correct format for JS. Does anyone have an all in one function to do what I'm after? example format Tue Apr 07 22:52:51 +0000 2009 Cannot use new Date(Date.parse("Tue Apr 07 22:52:51 +0000 20

[hirorock]

Twitterで表示されているような、時間経過表示のScript 例えば「10分前に投稿」や「1日前に投稿」などの表示を作れる。