<script>

        $(function(){

            int={

                a:1,

                b:function(){console.log('2');}

            };

            oldint={

                a:'aaa',

                b:function(){console.log('bbb')},

                c:'c',

                d:function(){console.log('ddd')}

            };

            currentint=$.extend({},oldint,int);

            console.log(currentint);

        })

    </script>    

$(function(){

            $.fn.cityLinkage = function () {

                cityObj(this);

            }

            var cityObj=function(el){

                var $el=$(el),

                    testobj={};

                var a={

                    bindclick:function(){

                        $el.on('click',function () {

                            console.log($el);

                            console.log(b.testb());

                        });

                    }

                }

                var b={

                    testb:function(){

                        return '111';

                    }

                }

                a.bindclick()

            }

            //用fnextend是为了 让this指向调用的对象

            $("#Addr2").cityLinkage();

        })