关于JavaScript中的表格冻结问题~~多谢~~~
各位好，小弟刚接触jsp，遇到一个问题。我建立了一个表格，现在我想实现表头冻结（下拉时第一行不动），应该怎么添加JS代码？我看到过网上的例子，他们都是直接输入的数据，而我的数据是从数据库中提取的，应该怎么做呢？JS代码怎么写？
麻烦各位高人指点指点~~~
<table border="2" width="100%" > <tr > <td height="25" width="100" align="center">年月</td> <td height="25" width="155" align="center">货物名</td> <td height="25" width="75" align="center">入库人</td> <td height="25" width="130" align="center">备注</td>......while(rs.next()){%> <tr> <td align="center" ><%=rs.getDate(1)%></td> <td width="144" ><%=rs.getObject(2)%> </td> <td width="73" align="center" > <%=rs.getObject(3)%></td> <td width="82" align="center" > <%=rs.getObject(4)%></td>......<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="this is my page"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"><title>MyHtml.html</title></head><style type="text/css">.fixedtd{ color:#FF0000; position:relative; top: expression(this.parentElement.parentElement.parentElement.scrollTop) z-index:1;}</style><body><div style="overflow:auto; height:100px; width: 690px;"> <table width="667" cellpadding="0" cellspacing="0" border="1"> <tr bgcolor="gray"> <td class="fixedtd" width="86">11111</td> <td class="fixedtd" width="120">22222</td> <td class="fixedtd" width="439">33333</td> </tr> <tr> <td>aaaaaa</td> <td>aaaaaa</td> <td>aaaaaa</td> </tr> <tr> <td>bbbbbb</td> <td>bbbbbb</td> <td>bbbbbb</td> </tr> <tr> <td>cccccc</td> <td>cccccc</td> <td>cccccc</td> </tr> <tr> <td>dddddd</td> <td>dddddd</td> <td>dddddd</td> </tr> <tr> <td>eeeeee</td> <td>eeeeee</td> <td>eeeeee</td> </tr> <tr> <td>ffffff</td> <td>ffffff</td> <td>ffffff</td> </tr> <tr> <td>gggggg</td> <td>gggggg</td> <td>gggggg</td> </tr> <tr> <td>hhhhhh</td> <td>hhhhhh</td> <td>hhhhhh</td> </tr> <tr> <td>iiiiii</td> <td>iiiiii</td> <td>iiiiii</td> </tr> </table></div></body></html>