js+ajax读取txt

原文地址：http://www.jb51.net/article/58205.htm

代码很简洁，这里就不多废话了，直接上源码

html代码

复制代码代码如下:

 <!doctype html>
 <html>
  <head>
      <meta charset="utf-8"/>
      </head>
      <body>
          <button type="button"  onclick="show()">请求数据</button>
         <script src="ajax.js"></script>
         <script>
           function show(){
             Ajax('read.txt?datetime=new Date.getTime ',function(str){alert(str);},function(){alert('失败了');})
           };
         </script>
      </body>
 </html>

javascript代码

复制代码代码如下:

  function Ajax(url,fnSucc,fnFaild)
             {
                  //1.创建ajax对象
                if(window.XMLHttpRequest)
                 {// code for IE7+, Firefox, Chrome, Opera, Safari
                      var oAjax=new XMLHttpRequest();
                 }
                else
                 {// code for IE6, IE5
                     var oAjax=new ActiveXObject("Microsoft.XMLHTTP");
                 }
                 //2.链接服务器（打开服务器的连接）
                 //open(方法，文件名，异步传输)
                 oAjax.open('GET',url,true);
                 //3.发送
                 oAjax.send();
                 //4.接收返回
                 oAjax.onreadystatechange=function()
                    {
                      if (oAjax.readyState==4)
                      {
                        if(oAjax.status==200)
                          { 
                            fnSucc(oAjax.responseText);  
                          }
                       else
                          {
                           fnFaild(oAjax.status);
                          }
                      };
                 };
              }