Dom 倒计时按钮

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head>    <meta http-equiv="Content-Type" content="text/html;charset=utf-8">    <title></title>    <style type="text/css">        .div1{            width:600px;            height:371px;            background-color: lightgray;        }    </style></head><body><div class="div1" id="div01">服务条款</div><br/><input id="register" type="submit" value="请先阅读服务条款(10)" disabled="disabled"/></body></html><script type="text/javascript">    //获得元素    var inputElement = document.getElementById("register");    //定时器    var remainTime = 10;    var intervalId = setInterval(function () {        remainTime--;        //判断剩余时间，如果大于0继续倒计时        if(remainTime>0){            inputElement.value = "请先阅读服务条款("+remainTime+")";        }else{            clearInterval(intervalId);            inputElement.value = "注册";            inputElement.disabled = false;        }    }, 1000)</script>

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