Drop Down Menu By Java Script
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
<style type="text/css">
ul.menu {list-style:none; margin:0; padding:0;font:11px Verdana,Arial;}
ul.menu * {margin:0; padding:0}
ul.menu a {display:block; color:#000; text-decoration:none}
ul.menu li {position:relative; float:left; margin:0px}
ul.menu ul {position:absolute; top:35px; left:0;width:170px; background:#d1d1d1; display:none;opacity:0; list-style:none}
ul.menu ul li {position:relative; border:0px; width:170px; margin:0}
ul.menu ul li a {display:block; color:#FFFFFF; padding-left:5px;border-bottom:#CCCCCC solid 1px; padding-top:9px;height:28px;}
ul.menu ul li a:hover { background-color:#666666; padding-left:8px;}
ul.menu ul ul {left:148px; top:-1px}
ul.menu .menulink { border:0px; font-weight:bold; color:#FFFFFF; text-align:center; padding-top:9px; background-color:#666666; height:26px; width:111px}
ul.menu .menulink:hover, ul.menu .menuhover { background-color:#000000; padding-top:7px; height:28px;}
ul.menu .sub {background:#d1d1d1}
</style>
<script language="javascript">
var menu=function(){
var t=15,z=50,s=6,a;
function dd(n){this.n=n; this.h=[]; this.c=[]}
dd.prototype.init=function(p,c){
a=c; var w=document.getElementById(p), s=w.getElementsByTagName('ul'), l=s.length, i=0;
for(i;i<l;i++){
var h=s[i].parentNode; this.h[i]=h; this.c[i]=s[i];
h.onmouseover=new Function(this.n+'.st('+i+',true)');
h.onmouseout=new Function(this.n+'.st('+i+')');
}
}
dd.prototype.st=function(x,f){
var c=this.c[x], h=this.h[x], p=h.getElementsByTagName('a')[0];
clearInterval(c.t); c.style.overflow='hidden';
if(f){
p.className+=' '+a;
if(!c.mh){c.style.display='block'; c.style.height=''; c.mh=c.offsetHeight; c.style.height=0}
if(c.mh==c.offsetHeight){c.style.overflow='visible'}
else{c.style.zIndex=z; z++; c.t=setInterval(function(){sl(c,1)},t)}
}else{p.className=p.className.replace(a,''); c.t=setInterval(function(){sl(c,-1)},t)}
}
function sl(c,f){
var h=c.offsetHeight;
if((h<=0&&f!=1)||(h>=c.mh&&f==1)){
if(f==1){c.style.filter=''; c.style.opacity=1; c.style.overflow='visible'}
clearInterval(c.t); return
}
var d=(f==1)?Math.ceil((c.mh-h)/s):Math.ceil(h/s), o=h/c.mh;
c.style.opacity=o; c.style.filter='alpha(opacity='+(o*100)+')';
c.style.height=h+(d*f)+'px'
}
return{dd:dd}
}();
</script>
<ul class="menu" id="menu">
<li><a href="#" class="menulink">Menu 1</a>
<ul>
<li><a href="#">Menu 1.1</a></li>
<li><a href="#">Menu 1.2</a></li>
<li><a href="#">Menu 1.3</a></li>
</ul>
</li>
<li><a href="#" class="menulink">Menu 2</a>
<ul>
<li><a href="#">Menu 2.1</a></li>
<li><a href="#">Menu 2.2 ></a>
<ul>
<li><a href="#">Menu 2.2.1</a></li>
<li><a href="#">Menu 2.2.2</a></li>
<li><a href="#">Menu 2.2.3</a></li>
</ul>
</li>
<li><a href="#">Menu 2.3</a></li>
</ul>
</li>
<li><a href="#" class="menulink">Menu 3</a></li>
</ul>
<script type="text/javascript">
var menu=new menu.dd("menu");
menu.init("menu","menuhover");
</script>
</body>
</html>
Click To Viev Demo
