60s验证等待 

<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript" src="jquery.js"></script>//需要自己引入jquery库
	</head>

	<body>
		<input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
	</body>

	<script>
		var countdown = 60;

		function settime(obj) {
			if(countdown == 0) {
				obj.removeAttribute("disabled");
				obj.value = "免费获取验证码";
				countdown = 60;
				return;
			} else {
				obj.setAttribute("disabled", true);
				obj.value = "重新发送(" + countdown + ")";
				countdown--;
			}
			setTimeout(function() {
				settime(obj)
			}, 1000)
		}
	</script>

</html>
posted @ 2017-06-05 17:45  安心牧羊人  阅读(110)  评论(0)  编辑  收藏  举报