<!DOCTYPE html>
<html>
<head lang="en"> <meta charset="UTF-8"> <title>table布局</title>
</head>
<body marginwidth="0px" marginheight="0px"> <table width="100%" height="650px" style="background-color: aqua"> <tr> <td colspan="3" width="100%" height="10%" style="background-color: chartreuse">这是头部</td> </tr> <tr> <td width="20%" height="80%" style="background-color: antiquewhite">左菜单</td> <td width="60%" height="80%" style="background-color: coral">内容</td> <td width="20%" height="80%" style="background-color: cornflowerblue">右菜单</td> </tr> <tr> <td colspan="3" width="100%" height="10%" style="background-color: crimson">这是底部</td> </tr> </table>
</body>
</html>
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