<!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>