典型的 ajax 异步请求及错误处理

 $.ajax({

     url: path + '/emergency/saveEmergency.do',

     async: false,//同步，会阻塞操作

     type: 'POST',//PUT DELETE POST

     data: $("#saveform").serialize(),

     success: function (result) {

 //                    console.log(result);

         if (result) {

             window.location.reload();

         }

     }, error: function(msg) {

         for(var info in msg)

             console.log(info + " = " + msg[info]);

     }

 })