<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3c.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
>
<html>
<head>
<meta http-equiv=
"Content-Type"
content=
"html/txt; charset=utf-8"
/>
<title>光滑展开合拢的JS菜单效果</title>
<style>
*{margin:0;padding:0;}
ul,li{list-style:none;}
#con{width:164px; margin:50px auto 0;}
#con h4.top{ height:4px; width:164px; overflow:hidden;}
#con h4.bottom{height:4px; width:164px;overflow:hidden;}
#con div{height:0px; overflow:hidden;}
#con h3{border-top:2px solid #fff; border-bottom:1px solid #D6EFFF;}
</style>
<script language=
"javascript"
>
var
speed = 30;
var
oCon = null;
var
oH3List = null;
var
oDivList = null;
var
oUlList = null;
var
oldNum = null;
var
clickNum = null;
var
hideTimer=null;
var
showTimer=null;
window.onload=
function
(){
oCon = document.getElementById(
"con"
);
oH3List = oCon.getElementsByTagName(
"h3"
);
oUlList = oCon.getElementsByTagName(
"ul"
);
oDivList = oCon.getElementsByTagName(
"div"
);
for
(
var
i=0;i<oUlList.length;i++){
oH3List[i].xuhao=i;
oH3List[i].onclick=
function
(){
clickNum =this.xuhao;
changeCatalog();
};
}
}
function
changeCatalog(){
var
old_num_2,click_num_2;
old_num_2 = null;
click_num_2= null;
if
(oldNum==null){
click_Num_2=clickNum;
showTimer = setInterval(
"showUl("
+click_Num_2+
")"
,speed);
}
else
if
(oldNum == clickNum){
old_num_2=oldNum;
hideTimer = setInterval(
"hideUl("
+old_num_2+
")"
,speed);
}
else
{
old_num_2=oldNum;
click_num_2=clickNum;
hideTimer = setInterval(
"hideUl("
+old_num_2+
")"
,speed);
showTimer = setInterval(
"showUl("
+click_num_2+
")"
,speed);
}
}
function
showUl(num){
var
move_num1 =Math.
ceil
((oUlList[num].offsetHeight-oDivList[num].offsetHeight)/10);
if
(move_num1>=1){
oDivList[num].style.height = oDivList[num].offsetHeight+move_num1+
"px"
;
}
else
{
oldNum=num;
clearInterval(showTimer);
}
}
function
hideUl(num){
var
move_num2=Math.
ceil
((oDivList[num].offsetHeight)/10);
if
(move_num2>0){
oDivList[num].style.height=oDivList[num].offsetHeight -move_num2+
"px"
;
}
else
{
clearInterval(hideTimer);
if
(clickNum==num){
oldNum=null;
}
}
}
</script>
</head>
<body>
<div id=
"con"
>
<h4
class
=
"top"
></h4>
<h1></h1>
<h3>设计素材</h3>
<div>
<ul>
<li>精品图标</li>
<li>图片幻灯</li>
<li>网页播放器</li>
</ul>
</div>
<h3>模板素材</h3>
<div>
<ul>
<li>企业网站</li>
<li>儿童网站</li>
<li>音乐网站</li>
<li>Discuz模板</li>
</ul>
</div>
<h3>脚本下载</h3>
<div>
<ul>
<li>jQuery</li>
<li>Ajax</li>
<li>PHP</li>
</ul>
</div>
<h3>网页特效</h3>
<div>
<ul>
<li>菜单</li>
<li>表单</li>
<li>浏览器</li>
</ul>
</div>
<h4
class
=
"bottom"
></h4>
</div>
</body>
</html>