0.3.3.js

    // Start the hash change handling, returning `true` if the current URL matches
    // an existing route, and `false` otherwise.
    start : function() {
      var docMode = document.documentMode;
      var oldIE = ($.browser.msie && (!docMode || docMode <= 7));
      if (oldIE) {
        this.iframe = $('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo('body')[0].contentWindow;
      }
      if ('onhashchange' in window && !oldIE && ($.browser.msie || docMode >= 8)) {
        $(window).bind('hashchange', this.checkUrl);
      } else {
        setInterval(this.checkUrl, this.interval);
      }
      return this.loadUrl();
    },