当我横向滚动页面时,背景颜色消失。怎么解决? 这是代码
<html>
<head>
</head>
<body style="margin:0 auto;">
<div align="center" width="100%" style=" background-color: #183337; height: 50px; ">
<table align="center" width="100%" border="0">
<tr>
<td>
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
</td>
</tr>
</table>
</div>
</body>
</html>