code: function(container, className, single) {
    if (single) {
      return container.getElementsByClassName(className)[0];
    } else {
      return container.getElementsByClassName(className);
    }
  }
docs: A cross-browser implementation of getElementsByClass.
  Heavily based on Dustin Diaz's function: http://dustindiaz.com/getelementsbyclass.
  
  Find all elements with class `className` inside `container`.
  Use `single = true` to increase performance in older browsers
  when only one element is needed.
  
  @param {String} className
  @param {Element} container
  @param {Boolean} single
  @api public