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非定位CSS+Js下拉菜單_菜單導航特效

非定位CSS+Js下拉菜單，看一下就會明白了，使用的是相對定位，不過效果還可以，用時候再修整一下，這個只是實現(xiàn)了大概功能，還有很多細節(jié)沒有修飾。

<html>
<head>
<title>非定位CSS+Js下拉菜單</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"><a href="#">Home</a></li>
<li class="menu"><a href="#">Products</a>
   <ul>
    <li><a href="#">Sub-item 1</a></li>
    <li><a href="#">Sub-item 2</a></li>
   </ul>
</li>
<li class="menu"><a href="#">Support</a>
   <ul>
    <li><a href="#">Sub-item 1</a></li>
    <li><a href="#">Sub-item 2</a></li>
   </ul>
</li>
<li class="menu"><a href="#">Employment</a>
   <ul>
    <li><a href="#">Sub-item 1</a></li>
    <li><a href="#">Sub-item 2</a></li>
   </ul>
</li>
<li class="menu"><a href="#">Contact Us</a>
   <ul>
    <li><a href="#">Sub-item 1</a></li>
    <li><a href="#">Sub-item 2</a></li>
   </ul>
</li>
</ul>
</body>
</html>

所屬頻道：菜單導航特效/更新時間：2012-11-04

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