<input type="button" class="sub_button" value="登入" onclick="submitUserInfo()">

$.ajax({

   url:url,
   data:params,
   type:"GET",
   async: false, //同步 
cache: false,  
       dataType:"json",

   xhrFields: {
          withCredentials: false
}, 
       success: function (response) {
           options.success 
 
&& options.success(response);
       },
       error: function (XMLHttpRequest, textStatus, errorThrown) {
       alert(XMLHttpRequest);
           options.fail && options.fail();
       }
});