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