还有相关的js和css要改吗？

<div id=menu18_out>
<div id=menu18_in>
<div id=menu18>
<UL id=nav>
<LI><a class="nav_off" id="mynav1" onmouseover="javascript:qiehuan(1)" href="/"><span>
  <h2>首&nbsp;&nbsp;页</h2>HOME</span></a></LI><li class="menu_line"></li>
<LI><a class="nav_off" id="mynav2" onmouseover="javascript:qiehuan(2)" href="/server.asp"><span>
  <h2>大类1</h2>SERVER</span></a></LI><li class="menu_line"></li>
<LI><a class="nav_off" id="mynav3" onmouseover="javascript:qiehuan(3)" href="/domain.asp"><span>
  <h2>大类2</h2>DOMAIN</span></a></LI><li class="menu_line"></li>
<div id=menu18_con>
<div id=qh_con1 style="DISPLAY: none"><UL class="floatleft">
<LI class="submenu" id=sub11><A href="/"><SPAN>大类1------子a</SPAN></A></LI>
<LI class="menu_line2"></LI>
<LI class="submenu" id=sub12><A href="/about.asp"><SPAN>大类1------子b</SPAN></A></LI>
<LI class="menu_line2"></LI>
<LI class="submenu" id=sub13><A href="/honor.asp"><SPAN>大类1------子c</SPAN></A></LI>

<LI class="menu_line2"></LI>
<LI class="submenu" id=sub14><A href="/contact.asp"><SPAN>大类1------子d</SPAN></A></LI>
<LI class="menu_line2"></LI>
<LI class="submenu" id=sub15><A href="/pay.asp"><SPAN>大类1------子e</SPAN></A></LI>
</UL>
</div>
<div id=qh_con2 style="DISPLAY: none"><UL class="floatleft">
<LI class="submenu" id=sub21><A href="/server.asp"><SPAN>大类2------子a</SPAN></A></LI>
<LI class="menu_line2"></LI>
<LI class="submenu" id=sub22><A href="/server02.asp"><SPAN>大类2------子b</SPAN></A></LI>


</div>