<!DOCTYPE html><html><head><meta charset="utf-8"><script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script><script type="text/javascript"> var countdown=60; function sendemail(){ ???var obj = $("#btn"); ???settime(obj); ???????}function settime(obj) { //发送验证码倒计时 ???if (countdown == 0) { ????????obj.attr(‘disabled‘,false); ????????//obj.removeattr("disabled"); ????????obj.val("免费获取验证码"); ???????countdown = 60; ????????return; ???} else { ????????obj.attr(‘disabled‘,true); ???????obj.val("重新发送(" + countdown + ")"); ???????countdown--; ????} setTimeout(function() { ????settime(obj) } ???,1000) }</script><body> <input type="button" id="btn" value="免费获取验证码" onclick="sendemail()" /> ??</body></html>jQuery登录倒计时
原文地址：https://www.cnblogs.com/xiaohuiji/p/9140125.html