原生js---ajax---get方法传数据@慕课网原创_慕课网

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        <button id="btn">点击</button>
    </body>
    <script>
        var btn=document.getElementById("btn");
        btn.=function(){
            //1.创建ajax对象(此处兼容性的创建)
            var xhr=null;
            try{
            xhr=new XMLHttpRequest();
            }catch(e){
            xhr=new ActiveXObject("Microsoft.XMLHTTP");
            }
            
            //2.调用open方法----注：xhr.open("方法"，"路径?数据"，"是否异步")
            xhr.open("get","links/2.get.php?username="+encodeURI('陆小曼')+"&age=18&timp="+new Date().getTime(),true);
            
            //3.发送数据
            xhr.send();
            
            //4.请求状态改变事件
            xhr.onreadystatechange=function(){
                if(xhr.readyState==4){
                    if(xhr.status==200){
                    document.write(xhr.responseText)
                    }else{
                    alert("错误"+xhr.status)
                    }
                }
            }
        }
    </script>
</html>