[TxMt] minor change to javascript folding

[Caio Chassot]

I changed the foldingStartMarker to this:

     '^.*\bfunction\s*([\$|\w]\w*\s*)?\([^\)]*\)(\s*\{[^\}]*)?\s*$';

The only reason is that now I can fold this funny-named prototype  
function:

     function $()

Anyway, if you want to commit this change...