顶部固定菜单栏在不同浏览器中位置不一样 [复制链接]

顶部固定菜单栏在不同浏览器中位置不一样，在ie中能居中，在火狐和360都显示靠左。请教斑竹，如何设置才能让他都能居中显示。（http://www.bdsz.com/）
顶部固定菜单栏代码如下：
<div style="positionixed;line-height:40px;width:100%;background:url(/e/images/bdsz_top_bg4.jpg) repeat-x 0 0; positionixed;height:40px;clear:both;overflow:hidden;top:0px;">
        <table class="ke-zeroborder" border="0" cellspacing="0" cellpadding="0" width="1000" align="center" height="40">
                <thead>
                        <tr>
                                <th style="text-align:left;">
                                        &nbsp;&nbsp; <a href="#">设为首页</a><strong> │ </strong><a href="#">收藏本站</a>&nbsp; │ <a href="http://www.eduyun.cn/" target="_blank">国家教育资源公共服务平台</a>&nbsp;
                                </th>
                                <th style="text-align:right;padding-right:10px;vertical-aligniddle;" valign="middle" scope="col">
                                        <strong><strong><strong><a href="http://192.168.3.3081/Login.aspx" target="_blank">数字校园</a><strong> │</strong><strong> </strong><strong><a href="ftp://user:user@192.168.3.3" target="_blank">办公平台</a></strong><strong> │ <a href="http://www.bdsz.com/zjsz/kyzx/">会员中心</a></strong><strong> │&nbsp;<a href="http://www.bdsz.com/e/master/index.aspx" target="_blank"><strong>管理登录</strong></a></strong>&nbsp;</strong></strong></strong><strong><strong>&nbsp; </strong></strong>
                                </th>
                        </tr>
                </thead>
                <tbody>
                </tbody>
        </table>
</div>