dialog组件的jquery封装实现

(function($){          $.extend({                     Dialog : function(id, options){                               var option = $.extend({}, options);                               option.id = id;                   if(!option.content || option.content == "") {                                             throw new Error("content不存在!");                              }                 if(option.content.indexOf("url:") == 0) {                                           url = option.content.replace("url:", "");                                           option.content = "loading...";                              }                            var dialog = art.dialog(options);                            $.Dialog.self = dialog;                            if(url) {                                             $.Ajax({                                                       url : url,                                                      success : function(msg){                                                          dialog.content(msg);                                                                                  }                                                       });                                            }                                }                    });               $.Dialog.PRototype = {                       close : function(){                                      $.Dialog.self.close();                                               }                      };                $.Dialog.constructor = Dialog; })(jQuery);