<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$(document).ajaxStop(function(){
alert("所有AJAX请求已经完成！");
});
$("button").click(function(){
$("div").load("demo_ajax_load.txt");
$("div").load("demo_ajax_load.php");
});
});
</script>
</head>
<body>
<div><h2>Let AJAX change this text</h2></div>
<button>Change Content</button>
</body>
</html>