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JavaScript+CSS+DIV实现下拉菜单示例 

<!DOCTYPE html>
<html>
  <head>
    <title>下拉菜单示例</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()">系列课程</td>
       <td width="120"onMouseMove="show('menu2')"onMouseOut="hide()">教学课程</td>
       <td width="120"onMouseMove="show('menu3')"onMouseOut="hide()">课程大纲</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++程序设计</span><br>
       <span>java程序设计</span><br>
       <span>c#程序设计</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++课件</span><br>
       <span>java课件</span><br>
       <span>c#课件</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++教学大纲</span><br>
       <span>java教学大纲</span><br>
       <span>c#教学大纲</span><br>
   </div>
  </body>
</html>

　　

posted on 2017-10-25 14:33  野心家  阅读(1613)  评论(0)  编辑  收藏  举报