BZbyr
11/1/2017 - 12:43 AM

AJAX_回调函数

From http://www.runoob.com/try/try.php?filename=tryajax_callback

AJAX_回调函数.html
content_copyfile_download
<!DOCTYPE html> 
<html> 
  <head> 
  <script> 
  var xmlhttp; 
  function loadXMLDoc(url,cfunc) { 
    if (window.XMLHttpRequest){
      // IE7+, Firefox, Chrome, Opera, Safari 代码   
      xmlhttp=new XMLHttpRequest();   
    } else   {
      // IE6, IE5 代码   
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");   
    } 
    xmlhttp.onreadystatechange=cfunc; 
    xmlhttp.open("POST",url,true); 
    xmlhttp.send(); 
    } 
    function myFunction() {  
      loadXMLDoc("/try/ajax/ajax_info.txt",function(){   
        if (xmlhttp.readyState==4 && xmlhttp.status==200){
          document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
        }  
      }); 
    } 
  </script> 
  </head> 
  <body>  
  <div id="myDiv">
    <h2>使用 AJAX 修改文本内容</h2>
  </div> 
  <button type="button" onclick="myFunction()">修改内容</button>  
  </body> 
  </html>