是哪里的代码错了吗，得出的结果是：距离设置时间还有233660575066天
<script language="javascript" type="text/javascript">
window.onload = function(){
var timedate= new Date(2016,11,30); //自定义结束时间
var now = new Date() ; //获取当前时间
var date = timedate.getTime() - now.getTime(); //得出的为毫秒
var time = Math.ceil(date/1000 * 60 * 60 * 24) ; //1000 * 60 * 60 * 24一天的秒数
if(time > 0 ){
document.getElementById('timeShow').innerHTML = time;
}
}
</script>
</head>
<body>
<div class="content2">
<div class="txtshow">距离设置时间还有<span id="timeShow"></span>天</div>
</div>
