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  • 60s倒计时

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    <script type="text/javascript" src="js/jquery.js"></script>
    </head>

    <body>
    <input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
    <script type="text/javascript">
    var countdown=60;
    function settime(val) {
    if (countdown == 0) {
    val.removeAttribute("disabled");
    val.value="免费获取验证码";
    countdown = 60;

    return;
    } else {
    val.setAttribute("disabled", true);
    val.value="重新发送(" + countdown + ")";
    countdown--;
    }
    setTimeout(function() {
    settime(val)
    },1000)
    }
    </script>
    </body>
    </html>

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  • 原文地址:https://www.cnblogs.com/whyuyan/p/5761194.html
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