<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>发送验证码倒计时</title>
</head>
<body>
<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>
</body>
</html>
