Javascript范围界定问题

var t=setTimeout( \"s.d.dialog( \'destroy\' )\" ,(s.o.msgTime*1000));

\"Uncaught ReferenceError: s is not defined\"

;(function ($) { 
      $.loader = function (data, options) {
    return $.loader.impl.init(data, options);
  };

  $.loader.close = function (data) {
    $.loader.impl.close(data);
  };

  $.loader.create = function () {
    $.loader.impl.create();
  };

$.loader.defaults = {
        appendTo: \'body\',
        autoCreate: true,
        msgTime: 5,
    };

$.loader.impl = {
    d: {},
    init: function(data, options){

        var s = this;
        s.o = $.extend({}, $.loader.defaults, options);

        if ((typeof data === \'object\')&&!(data instanceof jQuery)&&data.url) {

            data.success = function(data, textStatus, jqXHR){ $.loader.close(); }
            data.error = function(jqXHR, textStatus, errorThrown){ $.loader.close(\'Error accessing server\'); }
            $.ajax(data);
        }else if(s.o.autoCreate){
            s.create();
        }

        return s;
    },
    create: function() {
       var s = this;
       s.d = $(\'<div  id=\"dialog\" style=\"display:hidden\"><span style=\"width: 100%\" id=\"loading_diag\"><center><img src=\"http://www.mydomain.com/images/ajax-loader.gif\" /></center></span></div>\').appendTo(s.o.appendTo);
       s.d.dialog({ title: \'Loading ...\', dialogClass: \'noTitleStuff\', modal: true, draggable: false, resizable: false });

    },
    close: function(data)
    {
        var s = this;
        //alert(typeof s.d);
        if ((typeof data === \'string\')&&data) {
            $(\"#loading_diag\").hide();
            $(\"#dialog\").html(data);

            var t=setTimeout( \"s.d.dialog( \'destroy\' )\" ,(s.o.msgTime*1000));
        }else{
            s.d.dialog( \"destroy\" );
            }

        s.d= {};
    },
};

})(jQuery);