过滤表格中的链接(用javascript提取表格中的数据)

费话少说看代码!
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<table class=clssystab cellspacing=0 bordercolordark=#ccffcc cellpadding=0 width="100%" align=center bordercolorlight=#396942 border=1>
<tbody>
<tr class=clssystab_trtitle>
<td align=middle>员工id</td>
<td align=middle>中文姓名</td>
<td align=middle>英文姓名</td>
<td align=middle>部门id</td>
<td align=middle>身份证号</td>
<td align=middle>出生日期</td>
<td align=middle>email</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=yg1454">yg1454</a></td>
<td class=ygxxtabletd>fsdafs　</td>
<td class=ygxxtabletd>fsadf　</td>
<td class=ygxxtabletd>大　</td>
<td class=ygxxtabletd>fsadfsd　</td>
<td class=ygxxtabletd>2001-10-16　</td>
<td class=ygxxtabletd>4234234　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=yg1445">yg1445</a></td>
<td class=ygxxtabletd>sdds　</td>
<td class=ygxxtabletd>dsd　</td>
<td class=ygxxtabletd>组织结构　</td>
<td class=ygxxtabletd>fsdfd 　</td>
<td class=ygxxtabletd>2001-1-1　</td>
<td class=ygxxtabletd>fsdafs　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=ygiii">ygiii</a></td>
<td class=ygxxtabletd>李二　</td>
<td class=ygxxtabletd>lier　</td>
<td class=ygxxtabletd>组织结构　</td>
<td class=ygxxtabletd>43423423423　</td>
<td class=ygxxtabletd>1977-9-9　</td>
<td class=ygxxtabletd>4gsdfgdfsg　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=ccc">ccc</a></td>
<td class=ygxxtabletd>ccc　</td>
<td class=ygxxtabletd>cccc　</td>
<td class=ygxxtabletd>技术一部　</td>
<td class=ygxxtabletd>11111　</td>
<td class=ygxxtabletd>1977-9-9　</td>
<td class=ygxxtabletd>ccc　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=cdg1428">cdg1428</a></td>
<td class=ygxxtabletd>dasd　</td>
<td class=ygxxtabletd>dasda　</td>
<td class=ygxxtabletd>组织结构　</td>
<td class=ygxxtabletd>3213123　</td>
<td class=ygxxtabletd>2001-9-4　</td>
<td class=ygxxtabletd>eqweqwe　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=test">test</a></td>
<td class=ygxxtabletd>test　</td>
<td class=ygxxtabletd>test　</td>
<td class=ygxxtabletd>组织结构　</td>
<td class=ygxxtabletd>32132　</td>
<td class=ygxxtabletd>1977-9-9　</td>
<td class=ygxxtabletd>test.com　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=hestia2">hestia2</a></td>
<td class=ygxxtabletd>小猫　</td>
<td class=ygxxtabletd>hestia2　</td>
<td class=ygxxtabletd>食品分公司　</td>
<td class=ygxxtabletd>4237498234　</td>
<td class=ygxxtabletd>2001-9-2　</td>
<td class=ygxxtabletd>fdsf@fdsaf.com　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=hestia1">hestia1</a></td>
<td class=ygxxtabletd>诺亚　</td>
<td class=ygxxtabletd>hestia1　</td>
<td class=ygxxtabletd>部门a　</td>
<td class=ygxxtabletd>456123　</td>
<td class=ygxxtabletd>2001-9-3　</td>
<td class=ygxxtabletd>aa@aa.com　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=cdg1421">cdg1421</a></td>
<td class=ygxxtabletd>aasdf　</td>
<td class=ygxxtabletd>asfd　</td>
<td class=ygxxtabletd>食品分公司　</td>
<td class=ygxxtabletd>21341234　</td>
<td class=ygxxtabletd>2001-9-18　</td>
<td class=ygxxtabletd>asdf　</td></tr>
<tr class=clssystab_trcontent onmouseover="this.style.backgroundcolor=#f0f5f7;" onmouseout="this.style.backgroundcolor=; " valign=center align=middle>
<td><a href="?act=view&uid=cdg1420">cdg1420</a></td>
<td class=ygxxtabletd>asdf　</td>
<td class=ygxxtabletd>asdf　</td>
<td class=ygxxtabletd>组织结构　</td>
<td class=ygxxtabletd>22222222229999999999　</td>
<td class=ygxxtabletd>2001-9-18　</td>
<td class=ygxxtabletd>dffsdfsd　</td></tr></tbody></table>
<p>—————————————————-下面是过滤过的效果 </p>
<p>
  <script>
var td_num=document.all.tags("td").length;
var tr_num=document.all.tags("tr").length;
var cols=td_num/tr_num;
var i,j;
document.write ("<table border=1")
for (i=1;i<tr_num+1;i++){
    document.write ("\n<tr>");
    for (j=1;j<cols+1;j++){
    document.write ("\n<td>");
    document.write (document.all.tags("td")((i*cols-8)+j).innertext);
    document.write ("\n</td>");
    }
    document.write ("\n</tr>");    
}
document.write ("</table>")
</script>
</p>