code: function matchesSelector(element, selector) {
      var matchesImpl = element.matches || element.webkitMatchesSelector || element.mozMatchesSelector || element.msMatchesSelector || function (s) {
        return matchesSelector_SLOW(element, s);
      };
      return matchesImpl.call(element, selector);
    }
docs: Tests whether the element matches the selector specified
  
  @param {DOMNode|DOMWindow} element the element that we are querying
  @param {string} selector the CSS selector
  @return {boolean} true if the element matches the selector, false if not