点击验证码倒计时

https://www.jb51.net/article/74160.htm

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<input type="button" style="height:32px;width:120px;" value="点击发送验证码" onclick="sendCode(this)" />

<script type="text/javascript">

var clock = '';

var nums = 10;

var btn;

function sendCode(thisBtn) {

btn = thisBtn;

btn.disabled = true; //将按钮置为不可点击

btn.value = nums + '秒后可重新获取';

clock = setInterval(doLoop, 1000); //一秒执行一次

}

function doLoop() {

nums--;

if (nums > 0) {

btn.value = nums + '秒后可重新获取';

} else {

clearInterval(clock); //清除js定时器

btn.disabled = false;

btn.value = '点击发送验证码';

nums = 10; //重置时间

}

}

</script>