<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript">
window.onload=function(){
var send=document.getElementById('send'),
times=60;
timer=null;
send.onclick=function(){
timer=setInterval(function(){
times--
send.value=times+"秒后重试"
send.disabled=true
if(times<=50){
clearInterval(timer);
send.disabled=false
send.value="发送验证码";
}
},1000);
}
}
</script>
</head>
<body>
<input type="button" id="send" value="发送验证码">
</body>
</html>times忘了重置