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。