1 <!doctype html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 </head> 7 <body> 8 <script> 9 //a、new对象; 10 var xmlhttpRequest =null; 11 function ajaxRequest(){ 12 if(window.ActiveXObject){ 13 xmlhttpRequest = new ActiveXObject("Microsoft.XMLHTTP"); 14 }else if(Window.XMLHttpRequest){ 15 xmlhttpRequest = new XMLHttpRequest(); 16 }; 17 if(null != xmlhttpRequest){ 18 var v1 = 1,v2 = 2; 19 //AjaxServlet其实是url,ajax数据存放的地址； 20 //b.连接服务器吧; 21 xmlhttpRequest.open("get","AjaxServlet?v1="+v1+"&v2="+v2,true); 22 xmlhttpRequest.open("POST","AjaxServlet",true); 23 //d、处理回调 24 xmlhttpRequest.onreadystatechange = ajaxCallBack; 25 //post必须加下面这句，get时去掉； 26 //c、设置响应头，看情况，上去 27 xmlhttpRequest.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 28 //d、数据发送 29 xmlhttpRequest.send("v1="+v1+"&v2="+v2); 30 } 31 } 32 function ajaxCallBack(){ 33 if(xmlhttpRequest.readyState == 4){ 34 if(xmlhttpRequest.status == 200){ 35 var content = xmlhttpRequest.responseText; 36 console.log(content); 37 } 38 } 39 } 40 </script> 41 </body> 42 </html>
原文：http://www.cnblogs.com/suoking/p/4936855.html