Css Tasarim yaptim Menu gozukmuyor yardim

<table width="920" border="0" cellpadding="0" cellspacing="0">
  <tr>
    <td height="183" align="center" valign="top" background="http://img.webme.com/pic/s/skyspeed/1.gif"> </td>
  </tr>
  <tr>
    <td height="292" align="center" valign="top" background="http://img.webme.com/pic/s/skyspeed/2.gif"><table width="920" height="301" border="0" align="center" cellpadding="0" cellspacing="0">
      <tr>
        <td width="10"> </td>
        <td width="262" valign="top" bgcolor="#003399"> </td>
        <td width="34"> </td>
        <td width="604" valign="top" bgcolor="#0000FF"><p><div id="content"></p>

<td width="10"> </td>
      </tr>
    </table></td>
  </tr>
  <tr>
    <td height="126" align="center" valign="top" background="http://img.webme.com/pic/s/skyspeed/3.gif"> </td>
  </tr>
</table>

table {margin-left: auto;margin-right: auto} iframe{border:Solid 6px #FFFFFF;} h1#title{display: none;} h2#title span {display: none;} div.header{display: none;} li.nav_element{list-style-type: none;} li.nav_element{display: none;}