[Javascript] Inverting a regex pattern

[David Lovering]

Here's another question that I'm sure can be answered quickly, and then I'll 
spend the next month feeling stupid for having asked it --

Is there a quick-and-dirty way of creating a complementary regular 
expression, given another?  For example, if somebody gives me

    var re = /^\([2-9][0-9]{2}\)\b[2-9][0-9]{2}\-[0-9]{4}$/;

[a rather crude phone number pattern-match], can I do something like

    var not_re = /[^(re)]?/;        // obviously invalid, for a number of 
very good reasons //

to look for the shortest string which violates the original pattern?  If I 
could come up with something like that, my life would be complete and I 
would lack for nothing... [***]

-- Dave Lovering

*** Obviously a corollary of the "simple pleasures for simple minds" adage