javascript - Generate a random string based on a regular expression

Question

Is there any way of generating random text which satisfies provided regular expression.
I am looking for a function which works like below

var reg = Some Regular Expression  
var str = RandString(reg)

Answer 1

I have seen fairly good solutions in perl and ruby on github, but I think there are technical issues that make a complete solution impossible. For example, /[0-9]+/ has an infinite upper bound, which is not practical for selecting random numbers from.

Never seen it in JavaScript, but you could translate.

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EDIT: After googling for a few seconds... http://fent.github.com/randexp.js/