下拉菜单，编码与主导航菜单一致

Question

我不能建立一个基于我现有的导航css设计的下拉菜单。

这是当前的导航代码

                     <ul>
                        <li><a href="index" class="current">Home</a></li>
                        <li><a href="psat-sat-act-online-tutoring">Subjects &amp; Pricing</a></li>
                        <li><a href="how-online-tutoring-works">Get Started</a></li>
                        <li><a href="system-requirements">System Requirements</a></li>
                        <li><a href="faq-us">FAQ</a></li>
                        <li><a href="contact-us">Contact Us</a></li>


                    </ul>

和css代码

header h1 {background:url(../images/logo.png) no-repeat 0 0;padding:2px 0 0 38px;font-family:'ColaborateThinRegular';font-size:26px;line-height:1.2em;color:#fff;font-weight:normal;float:left}
header h1 a {color:#fff;text-decoration:none}
header h1 strong {font-family:'ColaborateBoldRegular';font-weight:normal}
header nav {padding:7px 0 10px 0}
header nav ul {float:right;padding:2px 0 0 0}
header nav ul li {float:left;padding-left:4px}
header nav ul li a {position:relative;float:left;font-size:12px;color:#fff;text-decoration:none;font-family:'ColaborateThinRegular';text-transform:uppercase;height:32px;line-height:32px;background-color:#181717;padding:0 36px 0 10px;border-radius:17px;-moz-border-radius:17px;-webkit-border-radius:17px}
header nav ul li a:hover, header nav ul li a.current {background-image:-moz-linear-gradient(top, #ee3c09, #b90a09);/* FF3.6 */background-image:-webkit-gradient(linear,left bottom,left top,color-stop(0, #ee3c09),color-stop(1, #b90a09));/* Saf4+, Chrome */filter: progid:DXImageTransform.Microsoft.gradient(startColorstr= '#ee3c09', endColorstr= '#b90a09');/* IE6,IE7 */-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr= '#ee3c09', endColorstr= '#b90a09')";/* IE8 */}
header nav ul li a:after {content:'';display:block;position:absolute;right:12px;top:13px;width:4px;height:7px;background:url(../images/arrow1.gif) no-repeat 0 0}
header .adv-content {overflow:hidden;background:#f9f9f9;padding:10px 0 8px 0}
header .breadcrumbs {float:left;padding:3px 0 0 10px}
header .breadcrumbs li {display:inline;color:#212121;padding-left:5px}

在get started选项卡下，我想添加一个多级下拉列表，感谢menu..all帮助

Answer 1

您尚未在HTML元素中定义类名。您还需要将一个新的无序列表添加到您想要拥有下拉列表的每个li中。

<div id="header">
<ul class="nav">
    <li><a href="index" class="current">Home</a></li>
    <li><a href="psat-sat-act-online-tutoring">Subjects &amp; Pricing</a></li>
    <li>
        <a href="how-online-tutoring-works">Get Started</a>
        <ul id="dropdown">
            <li><a href="#">Link 1</a>
            <li><a href="#">Link 2</a>
        </ul>
    </li>
    <li><a href="system-requirements">System Requirements</a></li>
    <li><a href="faq-us">FAQ</a></li>
    <li><a href="contact-us">Contact Us</a></li>
</ul>
</div>

然后，您需要将其添加到您的CSS。

ul.nav ul {
    visibility: hidden;
    z-index: 598;
}   
ul.nav li:hover > ul {
    visibility: visible;
}