• Multi-level CSS3 UL_LI Dropdown Menu


    https://www.script-tutorials.com/click-action-multilevel-css3-dropdown-menu/

    Step 1. HTML

    As usual, we start with the HTML.

    Here are full html code with our menu. As you can see – this is multi-level menu. I hope that you can easy to understand it. Whole menu built on UL-LI elements.

    index.html

    <link rel="stylesheet" href="css/style.css" type="text/css" media="screen">
    <div class="example">
        <ul id="nav">
            <li><a href="https://www.script-tutorials.com/">Home</a></li>
            <li><a class="fly" href="#" tabindex="1">Tutorials</a>
                <ul class="dd">
                    <li><a href="https://www.script-tutorials.com/category/html-css/">HTML / CSS</a></li>
                    <li><a class="fly" href="#" tabindex="1">JS / jQuery</a>
                        <ul>
                            <li><a href="https://www.script-tutorials.com/category/jquery/">jQuery</a></li>
                            <li><a href="https://www.script-tutorials.com/category/javascript/">JS</a></li>
                        </ul>
                    </li>
                    <li><a href="https://www.script-tutorials.com/category/php/">PHP</a></li>
                    <li><a href="https://www.script-tutorials.com/category/mysql/">MySQL</a></li>
                    <li><a href="https://www.script-tutorials.com/category/xslt/">XSLT</a></li>
                    <li><a href="https://www.script-tutorials.com/category/ajax/">Ajax</a></li>
                </ul>
            </li>
            <li><a class="fly" href="#" tabindex="1">Resources</a>
                <ul class="dd">
                    <li><a class="fly" href="#" tabindex="1">By category</a>
                        <ul>
                            <li><a href="https://www.script-tutorials.com/category/php/">PHP</a></li>
                            <li><a href="https://www.script-tutorials.com/category/mysql/">MySQL</a></li>
                            <li><a class="fly" href="#" tabindex="1">Menu1</a>
                                <ul>
                                    <li><a href="#">Menu1</a></li>
                                    <li><a href="#">Menu2</a></li>
                                    <li><a class="fly" href="#" tabindex="1">Menu3</a>
                                        <ul>
                                            <li><a href="#">Menu31</a></li>
                                            <li><a href="#">Menu32</a></li>
                                            <li><a href="#">Menu33</a></li>
                                            <li><a href="#">Menu34</a></li>
                                        </ul>
                                    </li>
                                    <li><a href="#">Menu4</a></li>
                                </ul>
                            </li>
                            <li><a href="https://www.script-tutorials.com/category/ajax/">Ajax</a></li>
                        </ul>
                    </li>
                    <li><a class="fly" href="#" tabindex="1">By tag name</a>
                        <ul>
                            <li><a href="https://www.script-tutorials.com/tag/captcha/">captcha</a></li>
                            <li><a href="https://www.script-tutorials.com/tag/gallery/">gallery</a></li>
                            <li><a href="https://www.script-tutorials.com/tag/animation/">animation</a></li>
                        </ul>
                    </li>
                </ul>
            </li>
            <li><a href="https://www.script-tutorials.com/about/">About</a></li>
            <li><a href="https://www.script-tutorials.com/click-action-multilevel-css3-dropdown-menu/">Go Back To The Tutorial</a></li>
        </ul>
    </div>
    

    Step 2. CSS

    Here are used CSS styles. First two selectors – layout of our demo page. All rest – belong to menu.

    css/style.css

    /* demo page styles */
    body {
        background:#eee;
        margin:0;
        padding:0;
    }
    .example {
        background:#fff url(../images/tech.jpg);
        770px;
        height:570px;
        border:1px #000 solid;
        margin:20px auto;
        padding:15px;
        border-radius:3px;
        -moz-border-radius:3px;
        -webkit-border-radius:3px;
    }
    /* main menu styles */
    #nav,#nav ul {
        background-image:url(../images/tr75.png);
        list-style:none;
        margin:0;
        padding:0;
    }
    #nav {
        height:41px;
        padding-left:5px;
        padding-top:5px;
        position:relative;
        z-index:2;
    }
    #nav ul {
        left:-9999px;
        position:absolute;
        top:37px;
        auto;
    }
    #nav ul ul {
        left:-9999px;
        position:absolute;
        top:0;
        auto;
    }
    #nav li {
        float:left;
        margin-right:5px;
        position:relative;
    }
    #nav li a {
        background:#c1c1bf;
        color:#000;
        display:block;
        float:left;
        font-size:16px;
        padding:8px 10px;
        text-decoration:none;
    }
    #nav > li > a {
        -moz-border-radius:6px;
        -webkit-border-radius:6px;
        -o-border-radius:6px;
        border-radius:6px;
        overflow:hidden;
    }
    #nav li a.fly {
        background:#c1c1bf url(../images/arrow.gif) no-repeat right center;
        padding-right:15px;
    }
    #nav ul li {
        margin:0;
    }
    #nav ul li a {
        120px;
    }
    #nav ul li a.fly {
        padding-right:10px;
    }
    /*hover styles*/
    #nav li:hover > a {
        background-color:#858180;
        color:#fff;
    }
    /*focus styles*/
        #nav li a:focus {
        outline-0;
    }
    /*popups*/
    #nav li a:active + ul.dd,#nav li a:focus + ul.dd,#nav li ul.dd:hover {
        left:0;
    }
    #nav ul.dd li a:active + ul,#nav ul.dd li a:focus + ul,#nav ul.dd li ul:hover {
        left:140px;
    }
    

    Step 3. Images

    Our menu using only three images: arrow.gif, tech.jpg and tr75.png. I don`t included them into tutorial, just because two of them very small (will difficult to locate it) and last one – just background image. All images will in package.


    Live Demo
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  • 原文地址:https://www.cnblogs.com/wfy680/p/14335475.html
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