xxxxxxxxxx<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title>表格</title></head><body> <table border="1" cellspacing="1" cellpadding="1" align="center"> <tr> <td colspan="2" align="center" style="background: #0395e1">顶部导航</td> </tr> <tr> <td style="background: #f25807" align="center" height="300px" width="100px"> 内<br>容<br> <br>侧<br>栏 </td> <td style="background: red" align="center" width="400px"> 主要内容 </td> </tr> <tr> <td colspan="2" style="background: darkorchid" align="center">底部</td> </tr> </table></body></html>