贴贴友请进

想做一个多层边框的帖子，用编辑助手的测试看，很正常，转到帖子预览里，顶部边框变形了，折腾了好长时间，一筹莫展，请大师指点迷径，拜托~！
<p align="center"> </p><table bordercolor="#cccccc" cellspacing="10" cellpadding="20" width="500" background="http://img.bimg.126.net/photo/bk5H1yEyWB4pGH08LRUtBA==/2898347835" border="2"> <tbody> <tr> <td> <table bordercolor="#cccccc" cellspacing="10" cellpadding="10" width="100%" background="http://img.bimg.126.net/photo/jNJL0EsVr2P-" seivmqysuw="=/1714745558122008452.jpg" border="1"> <tbody> <tr> <td> <table bordercolor="#cccccc" cellspacing="10" cellpadding="10" width="100%" bgcolor="#000000" background="http://img.bimg.126.net/photo/vdlU4zXhKhmTtoVW5n" border="1"> <tbody> <tr> <td> <table bordercolor="#cccccc" cellspacing="5" cellpadding="5" width="100%" background="http://img.bimg.126.net/photo/mkxt4TXime9L5whbS7Vtmg==/5427963450" border="2"> <tbody> <tr> <td> <table bordercolor="#cccccc" cellspacing="5" cellpadding="5" width="100%" background="http://img.bimg.126.net/photo/jNJL0EsVr2P-" seivmqysuw="=/1714745558122008452.jpg" border="1"> <tbody> <tr> <td> <p style="TEXT-INDENT: 2em" align="center"><img src="http://img.bimg.126.net/photo/o5XSzvIbTGXBRvbcMyABhw==/4515984526347173%0D%0A%0D%0A027.jpg">         <img src="http://img.bimg.126.net/photo/o5XSzvIbTGXBRvbcMyABhw==/4515984526347173%0D%0A%0D%0A027.jpg" border="0"></p><br> <p align="center"> </p><table height="750" cellpadding="0" width="500" align="center" background="http://dl.dropbox.com/u/3873896/3954723422786228374.jpg" border="0"> <tbody> <tr> <td><embed align="right" src="http://imgfree.21cn.com/free/flash/4.swf" width="450" height="550" type="application/x-shockwave-flash" quality="high" wmode="transparent"></embed><embed pluginspage="http://www.macromedia.com/go/getflashplayer" align="right" src="http://imgfree.21cn.com/free/flash/61.swf" width="450" height="550" type="application/x-shockwave-flash" wmode="transparent" quality="high"></embed><embed align="middle" src="http://space.wenxuecity.com/media/1264328583.mp3" width="0" height="0" type="audio/x-pn-realaudio-plugin" alt="(Random)" mime-types="mime.types" fn="load-types" init exts="ra,ram" volume="200" loop="true" autostart="true"></embed> </td></tr></tbody></table> </td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody>E></table></td></tr></tbody></table> </td></tr></tbody></table>