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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <script src="http://cdn.static.w3big.com/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $(document).ajaxStart(function(){ $(this).html("<img src='demo_wait.gif' />"); }); $("button").click(function(){ $("div").load("demo_ajax_load.php"); }); }); </script> </head> <body> <div><h2>使用 AJAX 修改文本</h2></div> <button>修改内容</button> </body> </html>