动态生成列表的Javascript下拉列表

我不知道从哪里开始。我使用wordpress自动生成菜单项列表，因此无法将鼠标指针硬编码到html中。如何将列表设置为下拉列表

我试图修改一个教程并使用类似的东西，但它不起作用。我真的不知道如何动态地抓取这些菜单并更改它们。Lil帮助？：

window.onload = initAll;

function initAll() {
    var allLinks = document.getElementsByTagName("li");

    for (var i=0; i<allLinks.length; i++) {
        if (allLinks[i].className.indexOf("menu-item") > -1) {
            allLinks[i].onmouseover = toggleMenu;
        }
    }
}

function toggleMenu() {
    document.getElementById(thisMenuName).style.display = "block";

}

window.onload=initAll；
函数initAll（）{
var allLinks=document.getElementsByTagName（“li”）；
对于（var i=0；i

这里是一个简单的CSS版本。不幸的是，它依赖于“hover”伪类，而非

#菜单顶部导航{ 边框：1px纯红； } #菜单顶部导航李{ 位置：相对位置； } #菜单顶部导航ul.子菜单{ 边框：1px纯绿色； 背景：黄色； 显示：无； 位置：绝对位置； 顶部：0px； 左：100px； z指数：1； } #菜单顶部导航>li：悬停ul.子菜单{ 显示：块； }

---

这是一个JS版本

    <div class="menu-header"><ul id="menu-top-nav" class="menu"><li id="menu-item-82" class="menu-item menu-item-type-post_type menu-item-object-page current-menu-item page_item page-item-4 current_page_item menu-item-82"><a href="http://localhost/wordpress/">HOME</a></li> 
<li id="menu-item-83" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-83"><a href="http://localhost/wordpress/about-ql/">About QL+</a> 
<ul class="sub-menu"> 
    <li id="menu-item-86" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-86"><a href="http://localhost/wordpress/about-ql/ql-laboratory/">QL+ LABORATORY</a></li> 
    <li id="menu-item-87" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-87"><a href="http://localhost/wordpress/about-ql/ql-leadership/">QL+ LEADERSHIP</a></li> 
    <li id="menu-item-84" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-84"><a href="http://localhost/wordpress/about-ql/a-history-of-ql/">A HISTORY OF QL+</a></li> 
    <li id="menu-item-85" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-85"><a href="http://localhost/wordpress/about-ql/fighting-for-life-the-film/">FIGHTING FOR LIFE, THE FILM</a></li> 
</ul> 
</li> 
<li id="menu-item-88" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-88"><a href="http://localhost/wordpress/our-work/">Our Work</a> 
<ul class="sub-menu"> 
    <li id="menu-item-93" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-93"><a href="http://localhost/wordpress/our-work/what-is-a-ql-challenge/">WHAT IS A QL+ CHALLENGE?</a></li> 
    <li id="menu-item-92" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-92"><a href="http://localhost/wordpress/our-work/successful-ql-projects/">SUCCESSFUL QL+ PROJECTS</a></li> 
    <li id="menu-item-90" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-90"><a href="http://localhost/wordpress/our-work/projects-in-development/">PROJECTS IN DEVELOPMENT</a></li> 
    <li id="menu-item-91" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-91"><a href="http://localhost/wordpress/our-work/submit-a-ql-challenge/">SUBMIT A QL+ CHALLENGE</a></li> 
    <li id="menu-item-89" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-89"><a href="http://localhost/wordpress/our-work/hear-from-ql-supporters/">HEAR FROM QL+ SUPPORTERS</a></li> 
</ul> 
</li> 
<li id="menu-item-94" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-94"><a href="http://localhost/wordpress/help-ql-help-our-heroes/">WAYS TO GIVE</a> 
<ul class="sub-menu"> 
    <li id="menu-item-95" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-95"><a href="http://localhost/wordpress/help-ql-help-our-heroes/donate-to-ql/">DONATE TO QL+</a></li> 
    <li id="menu-item-99" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-99"><a href="http://localhost/wordpress/help-ql-help-our-heroes/sponsorships/">SPONSORSHIPS</a></li> 
    <li id="menu-item-96" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-96"><a href="http://localhost/wordpress/help-ql-help-our-heroes/get-involved-volunteer/">VOLUNTEER!</a></li> 
    <li id="menu-item-97" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-97"><a href="http://localhost/wordpress/help-ql-help-our-heroes/ql-partners/">QL+ PARTNERS</a></li> 
    <li id="menu-item-98" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-98"><a href="http://localhost/wordpress/help-ql-help-our-heroes/ql-resources/">QL+ RESOURCES</a></li> 
</ul> 
</li> 
<li id="menu-item-100" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-100"><a href="http://localhost/wordpress/whats-happening/">WHAT&#8217;S HAPPENING</a> 
<ul class="sub-menu"> 
    <li id="menu-item-109" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-109"><a href="http://localhost/wordpress/whats-happening/press-releases/">Press Releases</a></li> 
    <li id="menu-item-103" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-103"><a href="http://localhost/wordpress/whats-happening/ql-in-the-news/">QL+ IN THE NEWS</a></li> 
    <li id="menu-item-112" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-112"><a href="http://localhost/wordpress/whats-happening/upcoming-events/">UPCOMING EVENTS</a></li> 
    <li id="menu-item-114" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-114"><a href="http://localhost/wordpress/whats-happening/special-events/">PREVIOUS EVENTS</a></li> 
</ul> 
</li> 
<li id="menu-item-105" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-105"><a href="http://localhost/wordpress/contact-ql/">CONTACT QL+</a></li> 
</ul></div> 

#menu-top-nav { border:1px solid red; } #menu-top-nav li { position:relative; } #menu-top-nav ul.sub-menu { border:1px solid green; background:yellow; display:none; position:absolute; top:0px; left: 100px; z-index:1; } #menu-top-nav > li:hover ul.sub-menu { display:block; }