<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <script src="/comlaw/js/jquery-1.8.3.min.js"></script> <script type="text/javascript"> function invokeSettime(obj){ var countdown=60; settime(obj); function settime(obj) { if (countdown == 0) { $(obj).attr("disabled",false); $(obj).text("获取验证码"); countdown = 60; return; } else { $(obj).attr("disabled",true); $(obj).text("(" + countdown + ") s 重新发送"); countdown--; } setTimeout(function() { settime(obj) } ,1000) } } </script> <body> <button id="btn" type="button" onclick="invokeSettime(this)">获取验证码</button> </body> </html>