鼠标悬停时动态翻滚的导航条_菜单导航特效

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鼠标悬停时动态翻滚的导航条，注意这里用了两个背景图，请等待网页加载完成或多刷新几次，这个是使用JavaScript实现的，不过代码好像是从jQuery里摘出来的，有点像。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=gb2312" />
<title>动态翻滚的导航条</title>
<style type="text/css">
.clear:after{mrc:"."; display:block; height:0; clear:both; visibility:hidden}.clear{display:inline-block}.clear{display:block}
div#nav{height:32px; background:url(http://p1.mb5u.com/texiao/1/YL29.jpg) repeat-x}
div#nav ul{
       width:705px;
       list-style:none;
       margin-top: 0;
       margin-right: auto;
       margin-bottom: 0;
       margin-left: 0px;
}
div#nav ul li{
       float:left;
       height:32px;
       overflow:hidden;
       background-image: url(http://p1.mb5u.com/texiao/1/YL30.jpg);
       background-repeat: repeat-y;
       background-position: right 0;
       padding-top: 0;
       padding-right: 1px;
       padding-bottom: 0;
       padding-left: 0px;
       font-family: Arial;
       font-size: 12px;
       line-height: 32px;
       font-weight: bold;
}
div#nav ul li a{
       float:left;
       height:100%;
       width: 77px;
       background:url(http://p1.mb5u.com/texiao/1/YL28.jpg) repeat-x;
       color:#fff;
       text-decoration:none;
       padding-top: 0;
       padding-right: 5px;
       padding-bottom: 0;
       padding-left: 5px;
       text-align:center;
}
div#nav ul li a.hover{
       clear:both;
       background-position:0 -32px;
       width: 77px;
}
div#nav ul li.on a{
       background-position:0 -32px;
}
div#nav ul li.nobg{background:none}
/* ]]> */
</style>
</head>
<body>
<div id="nav">
<ul class="clear">
<li><a href="#">源码爱好者</a></li>
<li><a href="#">网页特效</a></li>
<li><a href="#">工具软件</a></li>
<li><a href="#">源码下载</a></li>
<li><a href="#">菜单导航</a></li>
<li><a href="#">层和布局</a></li>
<li><a href="#">论坛社区</a></li>
<li><a href="#">广告联系</a></li>
<li class="nobg"></li>
</ul>
</div>
<script type="text/javascript"> 
/* <![CDATA[ */
function nav(c, config){
       this.config = config || {speed: 10, num: 2};
       this.container = (typeof(c)=="object") ? c : document.getElementById(c);
       this.lineHeight = this.container.offsetHeight;
       this.scrollTimeId = null;
       var _this = this;       
       this.__construct = function (){
              var inner,el,href;
              inner = _this.container.childNodes[0].innerHTML;
              href = _this.container.childNodes[0].href;
              el = document.createElement("a");
              el.innerHTML = inner;
              el.href = href;
              el.className = 'hover';
              _this.container.appendChild(el);
              _this.container.onmouseover = function (){_this.start()};
              _this.container.onmouseout  = function (){_this.end()};
       }();
       this.start = function (){
              _this.clear();
              _this.scrollTimeId = setTimeout(function(){_this.scrollUp();}, _this.config.speed);
       };
       this.end = function (){
              _this.clear();
              _this.scrollTimeId = setTimeout(function(){_this.scrollDown();}, _this.config.speed);
       };
       this.scrollUp = function (){
              var c = _this.container;      
              if(c.scrollTop >= _this.lineHeight){c.scrollTop = _this.lineHeight;return;}
              c.scrollTop += _this.config.num;
              _this.scrollTimeId = setTimeout(function(){_this.scrollUp();}, _this.config.speed);
       };
       this.scrollDown = function (){
              var c = _this.container;
              
              if(c.scrollTop <= 0){c.scrollTop = 0;return;}
              c.scrollTop -= _this.config.num;
              _this.scrollTimeId = setTimeout(function(){_this.scrollDown();}, _this.config.speed);
       };
       this.clear = function (){clearTimeout(_this.scrollTimeId)};
}
(function(){
       var container = document.getElementById('nav');
       var el_li = container.getElementsByTagName('li');
       var arr = [];
       for( var i = 0; i < el_li.length; i++){
              if(el_li[i].className == 'on') continue;
              arr[i] = new nav(el_li[i], {speed: 10, num: 4});
       }
})
();
/* ]]> */
</script>
</body>
</html>

所属频道：菜单导航特效/更新时间：2011-02-24

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