高分求助一个简单问题! 有关超链接下的

我想实现当鼠标移动到一个超链接时,出现一些下拉菜单的效果.
因为网络的关系,我无法打开其他的网站.希望你能帮我一下,给我JAVASCRIPE 代码!
在线等,立即给分!

解决方案 »

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用javascript和层就可以实现这样的效果了，具体的例子网上一堆
就是向网页上动态输出一个位于顶层的DIV，你可以先在网页上把这个DIV画出来，然后把整个DIV标记copy到链接的事件中，动态输出到页面上。
以下代码加入<head>区域
<style type="text/css">
.anylinkcss{
position:absolute;
visibility: hidden;
border:1px solid black;
border-bottom-width: 0;
font:normal 12px Verdana;
line-height: 18px;
z-index: 100;
background-color: #E9FECB;
width: 205px;
}.anylinkcss a{
width: 100%;
display: block;
text-indent: 3px;
border-bottom: 1px solid black;
padding: 1px 0;
text-decoration: none;
font-weight: bold;
text-indent: 5px;
}.anylinkcss a:hover{ /*hover background color*/
background-color: black;
color: white;
}</style>
<script language="javascript">
//more javascript from http://www.smallrain.net
var disappeardelay=250  //menu disappear speed onMouseout (in miliseconds)
var enableanchorlink=0 //Enable or disable the anchor link when clicked on? (1=e, 0=d)
var hidemenu_onclick=1 //hide menu when user clicks within menu? (1=yes, 0=no)/////No further editting neededvar ie5=document.all
var ns6=document.getElementById&&!document.allfunction getposOffset(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
}function showhide(obj, e, visible, hidden){
if (ie5||ns6)
dropmenuobj.style.left=dropmenuobj.style.top=-500
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
obj.visibility=visible
else if (e.type=="click")
obj.visibility=hidden
}function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}function clearbrowseredge(obj, whichedge){
var edgeoffset=0
if (whichedge=="rightedge"){
var windowedge=ie5 && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure-obj.offsetWidth
}
else{
var windowedge=ie5 && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure)
edgeoffset=dropmenuobj.contentmeasure+obj.offsetHeight
}
return edgeoffset
}function dropdownmenu(obj, e, dropmenuID){
if (window.event) event.cancelBubble=true
else if (e.stopPropagation) e.stopPropagation()
if (typeof dropmenuobj!="undefined") //hide previous menu
dropmenuobj.style.visibility="hidden"
clearhidemenu()
if (ie5||ns6){
obj.onmouseout=delayhidemenu
dropmenuobj=document.getElementById(dropmenuID)
if (hidemenu_onclick) dropmenuobj.onclick=function(){dropmenuobj.style.visibility='hidden'}
dropmenuobj.onmouseover=clearhidemenu
dropmenuobj.onmouseout=ie5? function(){ dynamichide(event)} : function(event){ dynamichide(event)}
showhide(dropmenuobj.style, e, "visible", "hidden")
dropmenuobj.x=getposOffset(obj, "left")
dropmenuobj.y=getposOffset(obj, "top")
dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px"
dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px"
}
return clickreturnvalue()
}function clickreturnvalue(){
if ((ie5||ns6) && !enableanchorlink) return false
else return true
}function contains_ns6(a, b) {
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
}function dynamichide(e){
if (ie5&&!dropmenuobj.contains(e.toElement))
delayhidemenu()
else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
delayhidemenu()
}function delayhidemenu(){
delayhide=setTimeout("dropmenuobj.style.visibility='hidden'",disappeardelay)
}function clearhidemenu(){
if (typeof delayhide!="undefined")
clearTimeout(delayhide)
}
</script>
===
以下代码加入<body>区域

<a href="http://www.smallrain.net/javascript" onClick="return clickreturnvalue()" onMouseover="dropdownmenu(this, event, 'anylinkmenu1')">网页特效</a>

<div id="anylinkmenu1" class="anylinkcss"><a href="http://www.smallrain.net/javascript.asp?type=图形图像">图形图像</a>
<a href="http://www.smallrain.net/javascript.asp?type=鼠标事件">鼠标事件</a>
<a href="http://www.smallrain.net/javascript.asp?type=时间日期">时间日期</a>
<a href="http://www.smallrain.net/javascript.asp?type=导航菜单">导航菜单</a>
<a href="http://www.smallrain.net/javascript.asp?type=窗体变化">窗体变化</a>
<a href="http://www.smallrain.net/javascript.asp?type=表单按钮">表单按钮</a>
<a href="http://www.smallrain.net/javascript.asp?type=特殊脚本">特殊脚本</a>
<a href="http://www.smallrain.net/javascript.asp?type=游戏娱乐">游戏娱乐</a>
</div> <a href="http://www.smallrain.net/study.asp" onClick="return clickreturnvalue()" onMouseover="dropdownmenu(this, event, 'anylinkmenu2')">网络学院</a>

<div id="anylinkmenu2" class="anylinkcss" style="width: 150px; background-color: lightyellow"><a href="http://www.smallrain.net/study.asp?type=网页制作">网页制作</a>
<a href="http://www.smallrain.net/study.asp?type=网络编程">网络编程</a>
<a href="http://www.smallrain.net/study.asp?type=图形图像">图形图像</a>
<a href="http://www.smallrain.net/study.asp?type=多媒体制作">多媒体制作</a>
<a href="http://www.smallrain.net/study.asp?type=网站建设">网站建设</a>
<a href="http://www.smallrain.net/study.asp?type=操作系统">操作系统</a>
</div>
说明：
这个菜单非常容易定制,关键就在下面红色字所标出的位置<a href=http://www.smallrain.net/study.asp onClick="return clickreturnvalue()" onMouseover="dropdownmenu(this, event, 'anylinkmenu2')">网络学院</a>

<div id="anylinkmenu2" class="anylinkcss" style="width: 150px; background-color: lightyellow"><a href="http://www.smallrain.net/study.asp?type=网页制作">网页制作</a>
<a href="http://www.smallrain.net/study.asp?type=网络编程">网络编程</a>
</div>
参考修改一下吧