js驗證碼倒計時

來源:互聯網
上載者:User

標籤:setattr   settime   擷取   color   his   驗證碼   element   attr   btn   

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>驗證碼的倒計時</title>    <style type="text/css">        *{ margin: 0; padding: 0}        #btn{                background: #fff;                 border-radius: 20%;                 text-align: center;                 font-size: 18px;                 font-weight: bold;                 color: #fff;                 margin: 100px auto;                 height: 50px;                 width: 150px;                color: #000;            }        #btn.set {            background: #666;            color: #fff;        }    </style></head><body><input type="button" id="btn" value="免費擷取驗證碼" /><script type="text/javascript">var wait=12;function time(o) {    if (wait == 0) {        o.removeAttribute("disabled");        o.className = "";        o.value="免費擷取驗證碼";        wait = 12;    }    else {        if(wait<10){            o.value="重新發送(0"+wait+")";            wait--;            setTimeout(function() {                time(o)            },1000)        }        else{            o.setAttribute("disabled", true);            o.className = "set";            o.value="重新發送(" + wait + ")";            wait--;            setTimeout(function() {                time(o)            },1000)        }    }}document.getElementById("btn").onclick=function(){    time(this);}  </script></body></html>

發送驗證碼倒計時效果

js驗證碼倒計時

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