本文实例讲述了JS+CSS实现大气清新的滑动菜单效果代码。分享给大家供大家参考，具体如下：
这是一款比较大气清新的滑动导航菜单，CSS和JavaScript配合完成，鼠标放到一级菜单上，会滑出二级的菜单，兼容性也不错，适合大多数网站使用，用到两张背景图片，请拷贝图片地址下载图片。
运行效果截图如下：
在线演示地址如下：
具体代码如下：
/p>
"/TR/xhtml1/DTD/xhtml1-transitional.dtd">
滑动导航菜单
body {margin:25px; font:12px Verdana, Arial, Helvetica}
* {padding:0; margin:0}
.dropdown {float:left; padding-right:5px}
.dropdown dt {width:188px; border:2px solid #9ac1c9; padding:8px; font-weight:bold; cursor:pointer; background:url(images/header.gif)}
.dropdown dt:hover {background:url(images/header_over.gif)}
.dropdown dd {position:absolute; overflow:hidden; width:208px; display:none; background:#fff; z-index:200; opacity:0}
.dropdown ul {width:204px; border:2px solid #9ac1c9; list-style:none; border-top:none}
.dropdown li {display:inline}
.dropdown a, .dropdown a:active, .dropdown a:visited {display:block; padding:5px; color:#333; text-decoration:none; background:#eaf0f2; width:194px}
.dropdown a:hover {background:#d9e1e4; color:#000}
.dropdown .underline {border-bottom:1px solid #b9d6dc}
var DDSPEED = 10;
var DDTIMER = 15;
function ddMenu(id,d){
var h = document.getElementById(id + '-ddheader');
var c = document.getElementById(id + '-ddcontent');
clearInterval(c.timer);
if(d == 1){
clearTimeout(h.timer);
if(c.maxh && c.maxh <= c.offsetHeight){return}
else if(!c.maxh){
c.style.display = 'block';
c.style.height = 'auto';
c.maxh = c.offsetHeight;
c.style.height = '0px';
}
c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
}else{
h.timer = setTimeout(function(){ddCollapse(c)},50);
}
}
function ddCollapse(c){
c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
}
function cancelHide(id){
var h = document.getElementById(id + '-ddheader');
var c = document.getElementById(id + '-ddcontent');
clearTimeout(h.timer);
clearInterval(c.timer);
if(c.offsetHeight < c.maxh){
c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
}
}
function ddSlide(c,d){
var currh = c.offsetHeight;
var dist;
if(d == 1){
dist = (Math.round((c.maxh - currh) / DDSPEED));
}else{
dist = (Math.round(currh / DDSPEED));
}
if(dist <= 1 && d == 1){
dist = 1;
}
c.style.height = currh + (dist * d) + 'px';
c.style.opacity = currh / c.maxh;
c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
clearInterval(c.timer);
}
}
源码下载最新源码下载排行脚本资源Ajax实例网页特效菜单导航层和布局图片特效
希望本文所述对大家JavaScript程序设计有所帮助。
