非定位CSS+Js下拉菜单

2024-09-05 12:20:18

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来源：转载

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非定位CSS+Js下拉菜单，看一下就会明白了，使用的是相对定位，不过效果还可以，用时候再修整一下，这个只是实现了大概功能，还有许多细节没有修饰。

<html><head><title>非定位CSS+Js下拉菜单</title><style>#menu {   position: absolute;   font-family: sans-serif;   font-size: 9pt;}#menu li {   float: left;   list-style-type: none;   width: 102px;   background-color: skyblue;   border: 1px solid #0066cc;   text-indent: 0px;   margin-left: 3px;}#menu li a {   color: blue;   text-decoration: none;   width: 100%;   display: block;}#menu li a:hover {   color: white;}#menu li ul {   background-color: skyblue;   margin: 0px;   padding: 0px;}#menu li ul li {   padding: 0px;   margin: 0px;   float: none;   list-style-type: none;   width: 100px;   text-indent: 0px;   border: none;}#menu li ul li a{   color: black;   text-decoration: none;}#menu li ul li a:hover{   color: black;   background-color: aqua;}</style><script language="javascript" type="text/javascript">var t=false,current;function SetupMenu() {   if (!document.getElementsByTagName) return;   items=document.getElementsByTagName("li");   for (i=0; i<items.length; i++) {      if (items[i].className != "menu") continue;      thelink=findChild(items[i],"A");      thelink.onmouseover=ShowMenu;      thelink.onmouseout=StartTimer;      if (ul=findChild(items[i],"UL")) {         ul.style.display="none";         for (j=0; j<ul.childNodes.length; j++) {            ul.childNodes[j].onmouseover=ResetTimer;            ul.childNodes[j].onmouseout=StartTimer;         }      }   } }function findChild(obj,tag) {   cn = obj.childNodes;   for (k=0; k<cn.length; k++) {     if (cn[k].nodeName==tag) return cn[k];   }   return false;}function ShowMenu(e) {   if (!e) var e = window.event;   thislink = (e.target) ? e.target: e.srcElement;   ResetTimer();   if (current) HideMenu(current);   thislink = thislink.parentNode;   current=thislink;   ul = findChild(thislink,"UL");   if (!ul) return;   ul.style.display="block";}function HideMenu(thelink) {   ul = findChild(thelink,"UL");   if (!ul) return;   ul.style.display="none";}function ResetTimer() {   if (t) window.clearTimeout(t);}function StartTimer() {   t = window.setTimeout("HideMenu(current)",200);}window.onload=SetupMenu;</script></head><body><h1>Menu Test</h1><ul id="menu"><li class="menu">Home</li><li class="menu">Products   <ul>    <li>Sub-item 1</li>    <li>Sub-item 2</li>   </ul></li><li class="menu">Support   <ul>    <li>Sub-item 1</li>    <li>Sub-item 2</li>   </ul></li><li class="menu">Employment   <ul>    <li>Sub-item 1</li>    <li>Sub-item 2</li>   </ul></li><li class="menu">Contact Us   <ul>    <li>Sub-item 1</li>    <li>Sub-item 2</li>   </ul></li></ul></body></html>

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