JS+CSS实现大气清新的滑动菜单效果代码

前端技术 2023/09/08 JavaScript

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：

http://demo.phpstudy.net/js/2015/js-css-dqqx-scroll-menu-demo/

具体代码如下：

<!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=gb2312\" />
<title>滑动导航菜单</title>
<style>
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}
</style>
<script type=\"text/javascript\">
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);
 }
}
</script>
</head>
<body>
<dl class=\"dropdown\">
 <dt id=\"one-ddheader\" onmouseover=\"ddMenu(\'one\',1)\" onmouseout=\"ddMenu(\'one\',-1)\">源码下载</dt>
 <dd id=\"one-ddcontent\" onmouseover=\"cancelHide(\'one\')\" onmouseout=\"ddMenu(\'one\',-1)\">
  <ul>
   <li><a href=\"#\" class=\"underline\">最新源码</a></li>
   <li><a href=\"#\" class=\"underline\">下载排行</a></li>
   <li><a href=\"#\" class=\"underline\">脚本资源</a></li>
   <li><a href=\"#\">Ajax实例</a></li>
  </ul>
 </dd>
</dl>
<dl class=\"dropdown\">
 <dt id=\"two-ddheader\" onmouseover=\"ddMenu(\'two\',1)\" onmouseout=\"ddMenu(\'two\',-1)\">网页特效</dt>
 <dd id=\"two-ddcontent\" onmouseover=\"cancelHide(\'two\')\" onmouseout=\"ddMenu(\'two\',-1)\">
  <ul>
   <li><a href=\"#\" class=\"underline\">菜单导航</a></li>
   <li><a href=\"#\" class=\"underline\">层和布局</a></li>
   <li><a href=\"#\" class=\"underline\">图片特效</a></li>
  </ul>
 </dd>
</dl>
</body>
</html>

希望本文所述对大家JavaScript程序设计有所帮助。

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