获取短信验证码(60s)-input

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Insert title here</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
<script src="/comlaw/js/jquery-1.8.3.min.js"></script>  
<script type="text/javascript">   
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> 
<body>   
<input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />   
   
</body>  
</html>  
原文地址:https://www.cnblogs.com/vmkash/p/8284489.html