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js获取验证码倒计时的实现方法

WBOY
Release: 2016-06-07 17:22:59
Original
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我们经常网购,在支付前为了验证客户的身体, 有时需要获取手机发送的验证码,当点击获取验证码按纽时会出现倒计时,如下图所示


js获取验证码倒计时的实现方法


实现方法:

<script src="./js/jquery-1.8.3.min.js"></script> 
<input type="button" id="btn" value="免费获取验证码" /> 
<script type="text/javascript"> 
var wait=60; 
function time(o) { 
if (wait == 0) { 
o.removeAttribute("disabled");	
o.value="免费获取验证码"; 
wait = 60; 
} else { 
o.setAttribute("disabled", true); 
o.value="重新发送(" + wait + ")"; 
wait--; 
setTimeout(function() { 
time(o) 
}, 
1000) 
} 
} 
document.getElementById("btn").onclick=function(){time(this);} 
</script>
Copy after login

注:参数var wait=60;为等待时间60秒,可以根据自身实际情况来设置。当在等待时间内获取不到验证码,可以点击重新获取。

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