需求：
<html> <head> <title>簡單的表格網頁布局</title> <meta charset="UTF-8"> </head> <body topmargin="0"> <table width="960px" align="center" border="0" cellpadding="0" cellspacing="0"> <tr bgcolor="red" height="90" align="center"><td><font color="white" size="6"><b>網頁頭部</b></font></td></tr> <tr bgcolor="green"> <td width="100%"> <table height="500" border="0" bgcolor="yellow" width="30%" align="left"> <tr><td align="center"><font color="white" size="6"><b>網頁左部</b></font></td></tr> </table> <table height="500" border="0" bgcolor="#f60" width="70%"> <tr><td align="center"><font color="white" size="6"><b>網頁右部</b></font></td></tr> </table> </td> </tr> <tr bgcolor="red" height="90" align="center"><td><font color="white" size="6"><b>網頁低部</b></font></td></tr> </table> </body> </html>