使用層做的下拉式功能表適應任何解析度！

用層做下拉式功能表先天不足，因為隨著解析度的改變而位置會變化，現在我們就來突破這點！
1.<a href="#" onMouseOver="MM_showHideLayers('Layer1','','show')" onMouseOut="MM_showHideLayers('Layer1','','hide')">關於我們</a>　
連結裡面的特效！
2.當然還有JS特效！

<script type="text/javascript">
<!--
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
//-->
</script>
3.下拉式功能表層的設計：
 <DIV id=Layer1 onMouseOver="MM_showHideLayers('Layer1','','show')" onMouseOut="MM_showHideLayers('Layer1','','hide')"
            style="Z-INDEX: 1; LEFT: 71px; WIDTH: 90px; POSITION: absolute; TOP: 14px; HEIGHT: 80px; visibility: hidden;"
           >
<TABLE cellSpacing=0 cellPadding=0 width="95%" border=0>
              <TBODY>
              <TR>
                <TD height=12></TD></TR></TBODY></TABLE>
            <TABLE cellSpacing=1 cellPadding=1 width="86" bgColor=#e4e4e4
            border=0>
              <TBODY>
              <TR>
                <TD height="20" align=center bgColor=#034949 class=titel_b><A
                  class=titel_b
                  href="Aboutus.asp">公司簡介</A>                </TD>
              </TR>
              <TR>
                <TD height="20" align=center bgColor=#034949><A class=titel_b
                  href="#"
                  target=_blank>企業理念 </A></TD>
              </TR>
              <TR>
        <TD height="20" align=center bgColor=#034949><SPAN class=titel_b><A
                  class=titel_b
                  href="#"
                  target=_blank>企業文化</A></SPAN></TD>
              </TR></TBODY></TABLE></DIV>
4.做一個表格專門放下拉式功能表的（重點），這個表格就放到下拉式功能表的表格的上面建的一個表格裡面即可定位。樣式表用class=ceng
<TABLE class=ceng cellSpacing=0 cellPadding=0 width="95%" border=0>
        <TBODY>
        <TR>
          <TD>
   放所有下拉式功能表的層的地方  </TD>
      </TR></TBODY></TABLE>
5.main.css
.ceng {
 POSITION: relative
}
好的，測試吧，沒問題了！