ajax与后台交互

 $.ajax({   type:"post",   url:"action/addc.a",   data:{caption:paracaption,remark:pararemark},   dataType:"json",   success:function(data){  alert(JSON.stringify(data));  alert(data.msgtype);   },   error:function(XMLHttpRequest, textStatus, errorThrown){   alert(errorThrown);   }   });

jauery方法

$.ajaxSetup({  async: false  });   $("#btnSubmit").click(      function(){       $.post(         "url", {   data }, function(msg){ }       );      }     );