为什么创建一个表格在浏览器打开顶部会空一行呢？
如图箭头指示的部分，为什么创建表格后用浏览器打开网页顶部会空出一行呢？
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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>活动首页</title>
<link rel="shortcut icon" href="favicon.ico"/>
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<table width="750" border="0" align="center" cellpadding="0" cellspacing="0">
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<tr>
<td width="10" height="202"><img src="images/in1logo.jpg" width="750" height="247" /></td>
</tr>
</table>
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style="Z-INDEX: 4; LEFT: 596px; WIDTH: 462px; POSITION: absolute; TOP: 13px; HEIGHT: 195px">
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<table width="750" border="0" align="center" cellpadding="0" cellspacing="0">
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<tr>
<td width="682" height="349" valign="top" bgcolor="#FFFFFF"><table width="614" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="31"><p class="style8"><strong></strong></p></td>
</tr>
<tr>
<td height="45"><span class="style1"> <span class="STYLE12"><span class="style7"></span>的<span class="style7"></span></span></span></td>
</tr>
<tr>
<td class="style1"><span class="STYLE12"><a href="index1.html" class="STYLE14"><strong><span class="STYLE14"></span>)</strong></a></span><span class="STYLE18">验证码：<span class="STYLE14">5288</span></span></td>
</tr>
<tr>
<td height="30"><span class="style61">温馨提示：</span></td>
</tr>
<tr>
<td><span class="STYLE12"></span></td>
</tr>
<tr>
<td><div align="center"><span class="STYLE18"><span class="style1">验证码</span>：<span class="STYLE13">5288</span></span></div></td>
</tr>
<tr>
<td><div align="center"><a href="index1.html"><img src="images/bottom.gif" width="79" height="23" border="0" /></a><br />
<a href="index1.html"><img src="images/ljlq.gif" width="131" height="43" border="0" /></a><br />
<br />
</div></td>
</tr>
<tr>
<td><div align="center"><span class="style8"> <strong><span class="STYLE19"></span></strong> <a href="gz.html" target="_blank"></a> <a href="gz.html" target="_blank"></a><span class="font_hong"> <br />
</span> </span> </div></td>
</tr>
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<tr>
<td width="613" height="13"> </td>
</tr>
</table>
<br />
<hr size="1" />
<table width="436" border="0" align="center" cellpadding="0" cellspacing="0">
<!--DWLayoutTable-->
<tr>
<td width="407" align="center" valign="middle"><span class="style1">增值电信业务经营许可证：<a href="http://mat1.qq.com/www/images/icp2009.jpg" target="_blank">粤B2-20090059</a> <a href="http://mat1.qq.com/www/images/icp20090028.jpg" target="_blank">B2-20090028</a><br />
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</td>
<td width="29" height="39" valign="middle"><img src="images/gongshang.png" width="29" height="39" border="0" /></td>
</table>
</table>
</body>
</html>
[解决办法]
body { margin:0; }