JS Get Function Arguments' Name

gistfile1.js

var STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg;

function getParamNames(func) {
  var fnStr  = func.toString().replace(STRIP_COMMENTS, '');
  var result = fnStr.slice(fnStr.indexOf('(')+1, fnStr.indexOf(')')).match(/([^\s,]+)/g);
  if (result === null) result = [];
  return result;
}