Js无缝滚动效果，支持不固定行高
<!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>Js无缝滚动</title>
<style type="text/css">
<!--
#nli_con {
height: 100px;
width: 300px;
overflow: hidden;
border: 1px solid #999999;
}
div,dl,dt,dd {
margin: 0px;
padding: 0px;
}
dl {
padding-top: 5px;
padding-bottom: 5px;
border-bottom-width: 1px;
border-bottom-style: solid;
border-bottom-color: #CCCCCC;
font-size: 14px;
margin-right: 10px;
margin-left: 10px;
}
dd {
font-size: 12px;
}
-->
</style>
<script language="javascript">
var $ = function (d){
typeof d == "string" &&(d = document.getElementById(d));
return $.fn.call(d);
};
$.fn = function (){//附加2个方法
this.$ADD = function (fn){CLS.add(this,fn)};
this.addEvent = function (sEventType,fnHandler){
if (this.addEventListener) {this.addEventListener(sEventType, fnHandler, false);}
else if (this.attachEvent) {this.attachEvent("on" + sEventType, fnHandler);}
else {this["on" + sEventType] = fnHandler;}
}
this.removeEvent = function (sEventType,fnHandler){
if (this.removeEventListener) {this.removeEventListener(sEventType, fnHandler, false);}
else if (this.detachEvent) {this.detachEvent("on" + sEventType, fnHandler);}
else { this["on" + sEventType] = null;}
}
return this;
};
var Class = {create: function() {return function() { this.initialize.apply(this, arguments); }}};
var Bind = function (obj,fun,arr){return function() {return fun.apply(obj,arr);}}
var Marquee = Class.create();
Marquee.prototype = {
initialize: function(id,name,out,speed) {
this.name = name;
this.box = $(id);
this.out = out;
this.speed = speed;
this.d = 1;
this.box.style.position = "relative";
this.box.scrollTop = 0;
var _li = this.box.firstChild;
while(typeof(_li.tagName)=="undefined")_li = _li.nextSibling;
this.lis = this.box.getElementsByTagName(_li.tagName);
this.len = this.lis.length;
for(var i=0;i<this.lis.length;i++){//计算该复制多少节点，保证无缝滚动，没必要的就不复制
var __li = document.createElement(_li.tagName);
__li.innerHTML = this.lis[i].innerHTML;
this.box.appendChild(__li);
if(this.lis[i].offsetTop>=this.box.offsetHeight)break;
}
this.Start();
this.box.addEvent("mouseover",Bind(this,function(){clearTimeout(this.timeout);},[]));
this.box.addEvent("mouseout",Bind(this,this.Start,[]));
},
Start:function (){
clearTimeout(this.timeout);
this.timeout = setTimeout(this.name+".Up()",this.out*1000)
},
Up:function(){
clearInterval(this.interval);
this.interval = setInterval(this.name+".Fun()",10);
},
Fun:function (){
this.box.scrollTop+=this.speed;
if(this.lis[this.d].offsetTop <= this.box.scrollTop){
clearInterval(this.interval);
this.box.scrollTop = this.lis[this.d].offsetTop;
this.Start();
this.d++;
}
if(this.d >= this.len + 1){
this.d = 1;
this.box.scrollTop = 0;
}
}
};
$(window).addEvent("load",function (){
marquee = new Marquee("nli_con","marquee",1,2);//加载完后运行代码，
});
</script>
</head>
<body>
<div id="nli_con">
<dl>
<dt><a href='http://www.codefans.net' target='_blank'><strong>2. 什么是虚拟主机？ </strong></a></dt>
<dd>虚拟主机是使用特殊的软硬件技术，把一台运行在因特网上的服务器主机分成一台台“虚拟”的主机，每一台虚拟主机都具有独立的域名，具有完整的Internet服务器（WWW、FTP、Email等）功能，虚拟主机之间完全独立，并可由用户自行管理，在外界看来，每一台虚拟主机和一台独立的主机完全一样。迅捷主机网为中小客户提供优质的网络环境和服务器，并由高级网管负责监控。</dd>
</dl>
<dl>
<dt><a href='#' target='_blank'><strong>3. 关于中小企业网站建设的知识</strong></a></dt>
<dd> 中小企业一直是企业上网工程主要服务的对象，中小企业上网的效果总是“犹抱琵琶半遮面”显现不出什么效果，本站整理了多年对中小企业服务的经验...</dd>
</dl>
<dl>
<dt><a href='http://www.baidu.com' target='_blank'><strong>4. 为什么要建立网站标准？什么是网站标准？</strong></a></dt>
<dd> 我们大部分人都有深刻体验，每当主流浏览器版本的升级，我们刚建立的网站就可能变得过时，我们就需要升级或者重新建造一遍网站。例如1996-1999年典型的</dd>
</dl>
</div>
<p>
<span>
$(window).addEvent("load",function (){
marquee = new Marquee("nli_con","marquee",a,b);//加载完后运行代码，nli_con是外框的id，a是间隔滚动的时间，b是滚动距离递增的数值
});
</span>
<p>
不需要固定一个行高，文档结构不一定非要像我这样。
dl可以换成div
<br/>
=============也可以使下面的结构==============
<br/>
ul
<br/>
li /li
<br/>
li /li
<br/>
/ul
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Js无缝滚动</title>
<style type="text/css">
<!--
#nli_con {
height: 100px;
width: 300px;
overflow: hidden;
border: 1px solid #999999;
}
div,dl,dt,dd {
margin: 0px;
padding: 0px;
}
dl {
padding-top: 5px;
padding-bottom: 5px;
border-bottom-width: 1px;
border-bottom-style: solid;
border-bottom-color: #CCCCCC;
font-size: 14px;
margin-right: 10px;
margin-left: 10px;
}
dd {
font-size: 12px;
}
-->
</style>
<script language="javascript">
var $ = function (d){
typeof d == "string" &&(d = document.getElementById(d));
return $.fn.call(d);
};
$.fn = function (){//附加2个方法
this.$ADD = function (fn){CLS.add(this,fn)};
this.addEvent = function (sEventType,fnHandler){
if (this.addEventListener) {this.addEventListener(sEventType, fnHandler, false);}
else if (this.attachEvent) {this.attachEvent("on" + sEventType, fnHandler);}
else {this["on" + sEventType] = fnHandler;}
}
this.removeEvent = function (sEventType,fnHandler){
if (this.removeEventListener) {this.removeEventListener(sEventType, fnHandler, false);}
else if (this.detachEvent) {this.detachEvent("on" + sEventType, fnHandler);}
else { this["on" + sEventType] = null;}
}
return this;
};
var Class = {create: function() {return function() { this.initialize.apply(this, arguments); }}};
var Bind = function (obj,fun,arr){return function() {return fun.apply(obj,arr);}}
var Marquee = Class.create();
Marquee.prototype = {
initialize: function(id,name,out,speed) {
this.name = name;
this.box = $(id);
this.out = out;
this.speed = speed;
this.d = 1;
this.box.style.position = "relative";
this.box.scrollTop = 0;
var _li = this.box.firstChild;
while(typeof(_li.tagName)=="undefined")_li = _li.nextSibling;
this.lis = this.box.getElementsByTagName(_li.tagName);
this.len = this.lis.length;
for(var i=0;i<this.lis.length;i++){//计算该复制多少节点，保证无缝滚动，没必要的就不复制
var __li = document.createElement(_li.tagName);
__li.innerHTML = this.lis[i].innerHTML;
this.box.appendChild(__li);
if(this.lis[i].offsetTop>=this.box.offsetHeight)break;
}
this.Start();
this.box.addEvent("mouseover",Bind(this,function(){clearTimeout(this.timeout);},[]));
this.box.addEvent("mouseout",Bind(this,this.Start,[]));
},
Start:function (){
clearTimeout(this.timeout);
this.timeout = setTimeout(this.name+".Up()",this.out*1000)
},
Up:function(){
clearInterval(this.interval);
this.interval = setInterval(this.name+".Fun()",10);
},
Fun:function (){
this.box.scrollTop+=this.speed;
if(this.lis[this.d].offsetTop <= this.box.scrollTop){
clearInterval(this.interval);
this.box.scrollTop = this.lis[this.d].offsetTop;
this.Start();
this.d++;
}
if(this.d >= this.len + 1){
this.d = 1;
this.box.scrollTop = 0;
}
}
};
$(window).addEvent("load",function (){
marquee = new Marquee("nli_con","marquee",1,2);//加载完后运行代码，
});
</script>
</head>
<body>
<div id="nli_con">
<dl>
<dt><a href='http://www.codefans.net' target='_blank'><strong>2. 什么是虚拟主机？ </strong></a></dt>
<dd>虚拟主机是使用特殊的软硬件技术，把一台运行在因特网上的服务器主机分成一台台“虚拟”的主机，每一台虚拟主机都具有独立的域名，具有完整的Internet服务器（WWW、FTP、Email等）功能，虚拟主机之间完全独立，并可由用户自行管理，在外界看来，每一台虚拟主机和一台独立的主机完全一样。迅捷主机网为中小客户提供优质的网络环境和服务器，并由高级网管负责监控。</dd>
</dl>
<dl>
<dt><a href='#' target='_blank'><strong>3. 关于中小企业网站建设的知识</strong></a></dt>
<dd> 中小企业一直是企业上网工程主要服务的对象，中小企业上网的效果总是“犹抱琵琶半遮面”显现不出什么效果，本站整理了多年对中小企业服务的经验...</dd>
</dl>
<dl>
<dt><a href='http://www.baidu.com' target='_blank'><strong>4. 为什么要建立网站标准？什么是网站标准？</strong></a></dt>
<dd> 我们大部分人都有深刻体验，每当主流浏览器版本的升级，我们刚建立的网站就可能变得过时，我们就需要升级或者重新建造一遍网站。例如1996-1999年典型的</dd>
</dl>
</div>
<p>
<span>
$(window).addEvent("load",function (){
marquee = new Marquee("nli_con","marquee",a,b);//加载完后运行代码，nli_con是外框的id，a是间隔滚动的时间，b是滚动距离递增的数值
});
</span>
<p>
不需要固定一个行高，文档结构不一定非要像我这样。
dl可以换成div
<br/>
=============也可以使下面的结构==============
<br/>
ul
<br/>
li /li
<br/>
li /li
<br/>
/ul
</body>
</html>