ajax error message

 $.ajax({   
     type: "POST",  
     url: "${root}/member/regist",   
     data: { "id" : $("id").val().trim() } , 
     dataType: "json",
     success: siguResult,
     error:function(request,status,error){
        alert("code:"+request.status+"\n"+"message:"+request.responseText+"\n"+"error:"+error);
       }
     }
 );
 
 
 
 

error : function(request, status, error) {

alert("code : " + request.status + "\n" + "message : " + request.responseText + "\n" + "error : " + error) ;

}

error 메시지 자꾸 잊으니 백업