jQuery(function($){
                var options = {
                  username: "sp_summit",
                  page: 1,
                  avatar_size: 24,
                  count: 4,
                  loading_text: "loading ..."
                };
        
                var widget = $("#paging .widget"),
                  next = $("#paging .next"),
                  prev = $("#paging .prev");
        
                var enable = function(el, yes) {
                  yes ? $(el).removeAttr('disabled') :
                        $(el).attr('disabled', true);
                };
        
                var stepClick = function(incr) {
                  return function() {
                    options.page = options.page + incr;
                    enable(this, false);
                    widget.tweet(options);
                  };
                };
        
                next.bind("checkstate", function() {
                  enable(this, widget.find("li").length == options.count)
                }).click(stepClick(1));
        
                prev.bind("checkstate", function() {
                  enable(this, options.page > 1)
                }).click(stepClick(-1));
        
                widget.tweet(options).bind("loaded", function() { next.add(prev).trigger("checkstate"); });
              });