<html><head><script type="text/javascript" src="/jquery/jquery.js"></script><script type="text/javascript">$(document).ready(function(){ $("button").click(function(){ alert($("input:text").val()); });});</script></head><body>Firstname: <input type="text" name="fname" value="Bill" /><br />Lastname: <input type="text" name="lname" value="Gates" /><br /><br /><button>获得第一个文本域的值</button></body></html>