为什么我这样无效不能向上滚动，求解。
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
* {
margin: 0px auto;
padding: 0;
}
#wai {
height: 200px;
width: 500px;
overflow: hidden;
margin-top: 100px;
}
#box {
height: 360px;
width: 100%;
background: #e7e7e7;
overflow: hidden;
}
#box ul li {
line-height: 40px;
font-size: 25px;
width: 400px;
text-align: center;
list-style: none;
overflow: hidden;
}
</style>
</head>
<body>
<div id="wai">
<div id="box">
<ul id="con1">
<li>1第一</li>
<li>2第二</li>
<li>3第三</li>
<li>4第四</li>
<li>5第五</li>
<li>6第六</li>
<li>7第七</li>
<li>8第八</li>
<li>9第九</li>
</ul>
<ul id="con2"></ul>
</div>
</div>
</body>
<script type="text/javascript">
var box = document.getElementById('box');
box.scrollTop = 10;
</script>
</html>
慕粉10485384442回答
-
一诺yinol
overflow:hidden; 截断了#wai { height: 200px; width: 500px; overflow: scroll; margin-top: 100px;}#box { height: 360px; width: 100%; background: #e7e7e7;}#box ul li { line-height: 40px; font-size: 25px; width: 400px; text-align: center; list-style: none;}
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JavaScript