jquery(ajax)与js(ajax)的比较

原始js：

 function update_mess(){
     var account_name = $("#account").val();
                     var xmlhttp;
                     if(window.XMLHttpRequest){
                         xmlhttp = new XMLHttpRequest;
                     }
                     else{
                         xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                     }
                     xmlhttp.onreadystatechange = function(){
                         if(xmlhttp.readyState == 4 && xmlhttp.status == 200){
                             var json = eval("("+ xmlhttp.responseText +")");
                             if(json.returnedjson.infostatus == 'T'){
                                 alert(json.returnedjson.infomsg);
                                 location.reload();
                             }
                             else{
                                 alert(json.returnedjson.infomsg);
                             }
                         }
                     }
                     var str = "account_id=" + account_id;
                     xmlhttp.open("post", "/update_mess_action", true);
                     xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                     xmlhttp.send(str);
 }

ajax提交方式比js原始的提交方式更为简介，具体如下：

 $.ajax({
         type:"post",
         url:"find_password_action?account_name="+ account_name + "&account_answer1=" + account_answer1 + "&account_answer2=" + account_answer2,
         success:function(date){
             var json = eval("("+ date +")");
             if(json.returnedjson.infostatus == "T"){
                 //alert(json.returnedjson.infomsg);
                 $("#mymodal1").modal("toggle");
             }
             else{
                 alert(json.returnedjson.infomsg);
             }
         },
         error:function (date){
             alert("找回密码失败！");
         },
     });

两种差不多，但是jquery的ajax更加灵活，对于post没有那么多的限制。