[原创]Jquery实现二级菜单-优快云博客

本文介绍了一种使用CSS实现的下拉菜单效果，通过浮动和定位属性实现了菜单项的显示与隐藏，并利用JavaScript增强了交互体验。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

<body>
    <div id="navigation" class="navigation">
        <ul class='menu'>
            <li><a href=''>首页</a></li>
            <li><a href=''>网站推荐</a>
                <ul class='sub-menu'>
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        </ul>
    </div>
</body>

/* Main Menu */
.navigation{ float:left; margin:0px 0px 0px; width:100%; height:32px; background-color:White; overflow:visible;}
.menu{ float:left; width:100%; height:34px; padding:1px 10px; position:relative; z-index:300; font-weight:normal;}
.menu li{  width:135px; float:left; margin:0px; padding:0px; font-size:18px; text-align:center; white-space:nowrap; background-color:White; }
.menu li.homepage{ background:none;}
.menu li a:link, .menu li a:visited{ margin:0px; padding:5px 0px 5px 0px; color:black; text-decoration:none; display:block; background-color:White;}
.menu li a:hover{ color:#94C365;   background-color:White;}
.menu li.current_page_item a:link, .menu li.current_page_item a:visited, .menu li.current_page_item a:hover, .menu li.current-menu-item a:link, .menu li.current-menu-item a:visited, .menu li.current-menu-item a:hover{ color:#94C365; }

.menu ul{ position:relative; z-index:300; background-color:White;}
.menu li{ position:relative;}
.menu li ul{ position:absolute; padding:0px; width:auto;  min-width:135px; text-align:center;   overflow:visible; left:0px; display:none;}
.menu li ul li{ margin:0px; width:auto; min-width:135px; text-align:center; overflow:visible; }
.menu li ul li a:hover{ color:#94C365; background-color:White; }

   <script type="text/javascript">
        window.onload = function () {
    
            document.querySelectorAll(".menu li").onmourseover = function () {
            
                this.querySelector("ul").style.display = "block";
            }
            document.querySelectorAll(".menu li").onmourseout = function () {
           
                this.querySelector("ul").style.display = "none";
                        }
        }
    </script>