gistfile1.js

// Backbone.history with HTML5 support 
(function() {
  var loc = window.location,
      pushSupport = !!(window.history && window.history.pushState),
      hashStrip = /^#*/;

  // add HTML5 support to Backbone.history, drop the old IE stuff
   _.extend(Backbone.History.prototype, {

    getFragment : function(l) {
      l = l || window.location;
      if (pushSupport){
        return l.pathname;
      } else {
        return l.hash.replace(hashStrip, '') || "/";
      }
    },

    start : function() {
      if (pushSupport) {
        // modern browsers
        $(window).bind('popstate', this.checkUrl);
      } else if ('onhashchange' in window) {
        // older browsers without pushState support
        if (loc.pathname === "/") {
          $(window).bind('hashchange', this.checkUrl);
        } else {
          // automatically redirect browsers to the BB-readable path
          var hashPath = "/#" + loc.pathname;
          loc.replace(hashPath);
          return;
        }
      }
      return this.loadUrl();
    },
    saveLocation : function(fragment) {
      //alert("new fragment: " + fragment)
      fragment = (fragment || '').replace(hashStrip, '');
      if (this.fragment == fragment)
        return;
      if (pushSupport) {
        this.fragment = fragment;
        history.pushState({
          ts: new Date().getTime()
        }, document.title, loc.protocol + "//" + loc.host + fragment);
      } else {
        window.location.hash = this.fragment = fragment;
      }
      // pass along fragment, as pushState seems to be async on Android
      this.loadUrl(fragment);
    },
    
    loadUrl : function(fragment) {
      fragment = this.fragment = (fragment || this.getFragment());
      var matched = _.any(this.handlers, function(handler) {
        if (handler.route.test(fragment)) {
          handler.callback(fragment);
          return true;
        }
      });
      return matched;
    }

  });
})();