[jQuery] any toolkit to validata the 'form' of Json text-string?

[Mead Lai]

I just use the Regular Expression, which my friend give me:

function checkJsonFormat(text){
        return !(/[^,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]/.test(text.replace(/"(\
\.|[^"\\])*"/g, '')));
}

Well, I can't clear it very much!
And it's only allowed double quotes " but I wanne use single quote '
sometimes in some case.
So any boy can provide the usefull toolkit or idea to check the form
of JSON?

Really Appreciate.
Mead Lai