A Bit of Advice for the JavaScript Semicolon Haters

I've never liked the aesthetics of a leading comma....

  var foo = {
        bar: 100
      , baz: 200
  };

However the fact that (some) Javascript engines don't like trailing commas...

  var foo = {
      bar: 100,
      baz: 200,    // this borked the last time I tried it!
  };

causes me no end of trouble coming from regular Perl usage where they are allowed (and recommended best practise).