syntaxerror：missing; before语句，但json数据有效

Question

url返回的json数据

{"s":"1","m":{"u":{"id":1043,"sn":5,"e":null,"p":"Lusers/2014/08/04/09/1407117513448.jpg","nn":"LandRoverq","ci":null,"m":"18661035698","im":"1","bd":"1982-05-20"},"a":"1.7"} }

js处理它

$("body").undelegate(".mem_gc_btn","click").delegate(".mem_gc_btn","click",function(){
    $(".pyloading").show();

   $.ajax({
        url :  "http://api.p1pai.com:8388/d/v3.0/u/d?jc=?&u=1043&tk=8E1266E084592E3732AEAE8426A2EE38&mc=8942A0A8-781A-43A8-A472-BD802BD56816&k1=v2LgZ2flnOSixUJH93ERsgrA2f7idFinmQpg8X4ZvYsY7zvG07kJR/G35Sioflce",
        dataType : "json",
        type : "post",
        contentType: "application/json",
        success: function(json) {
                 $(".pyloading").hide();
                 if (json) {
                    alert('success');
                  }else{
                    alert('failed');
                  }
            }
        });

但是我在firefox中使用了firebug，它显示了这个错误！