达人请进，花一上午琢磨的浮动购物车，可是只在ie中有效 fx下怎么也有效呢？

<SCRIPT LANGUAGE="JavaScript">
function show_CommCart_True()
{
document.all("CommCart_True").style.display="inline"
document.all("CommCart_False").style.display="none"
}
function show_CommCart_Close()
{
document.all("CommCart_True").style.display="none"
document.all("CommCart_False").style.display="none"
}
function show_CommCart_False()
{
document.all("CommCart_True").style.display="none"
document.all("CommCart_False").style.display="inline"
}
</SCRIPT>
<table width="800" border="0" cellspacing="0" cellpadding="0" height="1000">
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</table>
<div style="position:absolute;top:expression(document.body.clientHeight+document.body.scrollTop-this.offsetHeight);left:157px;width:158px;height:30px;">
<table width="800" align="center" cellpadding="0" cellspacing="0">
<tr>
<td valign="bottom">
<table align="left" cellpadding="0" cellspacing="1">
<tr>
<td>
<table cellpadding="1" cellspacing="1" bgcolor="#666666" id="CommCart_True" style="display:none;">
<tr><td>
<table width="630"border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td width="22" rowspan="4" align="center" valign="middle">
<input name="checkbox" type="checkbox" value="checkbox" checked="checked" />
</td>
<td width="108" rowspan="4" align="center" valign="middle"><a href="#" class="pic"><img src="img/index_34.jpg" /></a></td>
<td width="184" height="20"><a href="#" class="c2">盛饭的帽子</a></td>
<td width="76" height="20" align="center" valign="middle" bgcolor="#f8f8f8">单价(RMB)</td>
<td width="82" height="20" align="center" valign="middle">数量:</td>
<td width="78" height="20" align="center" valign="middle" bgcolor="#f8f8f8">小计(RMB)</td>
<td width="80" height="20" align="center" valign="middle"><a href="goodsinf.html" class="c2">单独设置</a></td>
</tr>
<tr>
<td height="20">商户：<a href="#" class="c2">peizhi</a> </td>
<td height="20" rowspan="3" align="center" valign="middle" bgcolor="#f8f8f8">5230</td>
<td height="20" rowspan="3" align="center" valign="middle"><input size="4" />
/15件 </td>
<td height="20" rowspan="3" align="center" valign="middle" bgcolor="#f8f8f8">15690</td>
<td height="20" align="center" valign="middle"><a href="#" class="c2">更新数量</a></td>
</tr>
<tr>
<td height="20">所在地：北京 海淀</td>
<td height="20" align="center" valign="middle"><a href="#" class="c2">移到收藏</a></td>
</tr>
<tr>
<td height="20">支持<a href="#" class="c2"><img src="img/chinabank.gif" align="absmiddle" />网银在线</a> <a href="#" class="c2"><img src="img/icon_alipay_16x16.gif" align="absmiddle" />支付宝</a>付款</td>
<td height="20" align="center" valign="middle"><a href="#" class="c2">删除商品</a></td>
</tr>
</table>
</td></tr>
<tr><td> 全选 清空 合计:15690元RMB 不含物流费用 支付</td></tr>
</table>
</td></tr>
<tr><td><a href="#" onClick="show_CommCart_True();">▌我的购物车</a> <a href="#" onClick="show_CommCart_Close();">关闭</a></td></tr>
</table>
</td>
<td width="20"></td>
<td valign="bottom">
<table align="center" cellpadding="0" cellspacing="0">
<tr><td>
<table align="center" cellpadding="0" cellspacing="0" id="CommCart_False" style="display:none;">
<tr><td>个人首页</td><td>个人资料</td></tr>
<tr><td>信件管理</td><td>帐号设置</td></tr>
<tr><td>我的交易</td><td>购 物 车</td>
<tr><td>标签管理</td><td>好友管理</td>
</tr>
</table>
</td></tr>
<tr><td><a href="#" onClick="show_CommCart_False();" >▌快速跳转</a> <a href="#" onClick="show_CommCart_Close();">关闭</a></td></tr>
</table>
</td>
</tr>
</table>
</div>