$(function(){

  // For each .bbq widget, keep a data object containing a mapping of
  // url-to-container for caching purposes.
  $('.bbq').each(function(){
    $(this).data( 'bbq', {
      cache: {
        // If url is '' (no fragment), display this div's content.
        '': $(this).find('.bbq-default')
      }
    });
  });



  // For all links inside a .bbq widget, push the appropriate state onto the
  // history when clicked.
  $('.bbqLink').live( 'click', function(e){
    var state = {},

      // Get the id of this .bbq widget.

      id = $(this).attr( 'targetId' ),


      // Get the url from the link's href attribute, stripping any leading #.
      url = $(this).attr( 'href' ).replace( /^#/, '' );
            

    // Set the state!
    state[ id ] = url;
    $.bbq.pushState( state );

    // And finally, prevent the default link click behavior by returning false.
    return false;
  });

  // Bind an event to window.onhashchange that, when the history state changes,
  // iterates over all .bbq widgets, getting their appropriate url from the
  // current state. If that .bbq widget's url has changed, display either our
  // cached content or fetch new content to be displayed.
  $(window).bind( 'hashchange', function(e) {

    // Iterate over all .bbq widgets.
    $('.bbq').each(function(){
      var that = $(this),

        // Get the stored data for this .bbq widget.
        data = that.data( 'bbq' ),

        // Get the url for this .bbq widget from the hash, based on the
        // appropriate id property. In jQuery 1.4, you should use e.getState()
        // instead of $.bbq.getState().
        url = $.bbq.getState( that.attr( 'id' ) ) || '';

      // If the url hasn't changed, do nothing and skip to the next .bbq widget.
      if ( data.url === url ) { return; }

      // Store the url for the next time around.
      data.url = url;

      // Remove .bbq-current class from any previously "current" link(s).
      that.find( 'a.bbq-current' ).removeClass( 'bbq-current' );

      // Hide any visible ajax content.
      that.find( '.bbq-content' ).children( ':visible' ).hide();

      // Add .bbq-current class to "current" nav link(s), only if url isn't empty.
      url && that.find( 'a[href="#' + url + '"]' ).addClass( 'bbq-current' );

      if ( data.cache[ url ] ) {
        // Since the widget is already in the cache, it doesn't need to be
        // created, so instead of creating it again, let's just show it!
        data.cache[ url ].show();

      } else {
        // Show "loading" content while AJAX content loads.
        that.find( '.bbq-loading' ).show();

        // Create container for this url's content and store a reference to it in
        // the cache.
        data.cache[ url ] = $( '<div class="bbq-item"/>' )

          // Append the content container to the parent container.
          .appendTo( that.find( '.bbq-content' ) )

          // Load external content via AJAX. Note that in order to keep this
          // example streamlined, only the content in .infobox is shown. You'll
          // want to change this based on your needs.
          .load( url, function(){
            // Content loaded, hide "loading" content.
            that.find( '.bbq-loading' ).hide();
          });
      }
    });
  })

  // Since the event is only triggered when the hash changes, we need to trigger
  // the event now, to handle the hash the page may have loaded with.
  $(window).trigger( 'hashchange' );

});