JavaScript+CSS+DIV實現下拉式功能表樣本

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<!DOCTYPE html><html>  <head>    <title>下拉式功能表樣本</title><script language="javaScript">    function show(menu)        {document.getElementById(menu).style.visibility="visible";}    function hide(){        document.getElementById("menu1").style.visibility="hidden";        document.getElementById("menu2").style.visibility="hidden";        document.getElementById("menu3").style.visibility="hidden";    }</script>  </head>    <body>   <table>       <tr bgcolor="#9999FF"align="center">       <td width="120"onMouseMove="show(‘menu1‘)"onMouseOut="hide()">系列課程</td>       <td width="120"onMouseMove="show(‘menu2‘)"onMouseOut="hide()">教學課程</td>       <td width="120"onMouseMove="show(‘menu3‘)"onMouseOut="hide()">課程大綱</td>       </tr>   </table>   <div id="menu1"onMouseMove="show(‘menu1‘)"onMouseOut="hide()"       style="background:#9999FF;position:absolute;left:12;top:38;width:120;visibility:hidden">       <span>c++程式設計</span><br>       <span>java程式設計</span><br>       <span>c#程式設計</span><br>   </div>   <div id="menu2"onMouseMove="show(‘menu2‘)"onMouseOut="hide()"       style="background:#9999FF;position:absolute;left:137;top:38;width:120;visibility:hidden">       <span>c++課件</span><br>       <span>java課件</span><br>       <span>c#課件</span><br>   </div>   <div id="menu3"onMouseMove="show(‘menu3‘)"onMouseOut="hide()"       style="background:#9999FF;position:absolute;left:260;top:38;width:120;visibility:hidden">       <span>c++教學大綱</span><br>       <span>java教學大綱</span><br>       <span>c#教學大綱</span><br>   </div>  </body></html>

　　

JavaScript+CSS+DIV實現下拉式功能表樣本