原文出处 http://www.codefans.net/jscss/code/2964.shtml
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>图片无缝滚动</title>
<script type="text/javascript" src="http://www.codefans.net/ajaxjs/jquery-1.6.2.min.js"></script>
<style type="text/css">
*{ margin:0; padding:0;}
#box{ border:1px #ccc solid; width:600px; height:200px; overflow:hidden;margin:100px auto 0; position:relative;}
#div{ width:2400px; position:relative;}
#img,#img1{ list-style:none; width:1200px; float:left;}
#img img,#img1 img{width:200px; float:left;}
ul li{ float:left;}
#but{ width:600px; height:30px; margin:0 auto;}
#a{ float:left;}
#b{ float:right;}
#but input{ width:80px; height:30px; font-size:22px; font-weight:bold;}
</style>
</head>
<body>
<div id="box">
<div id="div">
<ul id="img">
<li><img src="/jscss/demoimg/wall_s1.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s2.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s3.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s4.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s5.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s6.jpg" /></li>
</ul>
<ul id="img1">
<li><img src="/jscss/demoimg/wall_s1.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s2.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s3.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s4.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s5.jpg" /></li>
<li><img src="/jscss/demoimg/wall_s6.jpg" /></li>
</ul>
</div>
</div>
<div id="but">
<div id="a"><input type="button" id="but1" value="左移" /></div>
<div id="b"><input type="button" id="but2" value="右移" /></div>
</div>
<script type="text/javascript">
/*获取id节点的函数*/
$(function(){
function getId(id){
return $('#'+id);
}
/*创建图片滚动对象(前四个参数是标签的id)*/
function marquee(divElem,imgElem,lBut,rBut,imgWidth,speed,autoSpeed){//参数含义(包含两组图片的div，包含一组图片的ul，左侧按钮，右侧按钮,图片宽度，单张图片滚动时间，图片滚动间隔时间)
this.box=getId(divElem);
this.img=getId(imgElem);
this.lBut=getId(lBut);
this.rBut=getId(rBut);//获取各个节点
this.imgWidth=imgWidth;
this.speed=speed;
this.autoSpeed=autoSpeed;
this.num=0;//全局变量,用来进行条件控制
var that=this;
/*图片自动滚动函数*/
this.autoGo=function(){
that.num+=that.imgWidth;
that.box.animate({right:"+="+that.imgWidth+"px"},that.speed);
if(that.num>=that.img.width()){
that.num=0;
that.box.animate({right:"0px"},0);
}
}
}
/*对象方法*/
marquee.prototype={
/*图片的自动滚动*/
autoScroll:function(){
var that=this;
auto=setInterval(this.autoGo,this.autoSpeed);
this.box.mouseover(function(){
clearInterval(auto);
});
this.box.mouseout(function(){
auto=setInterval(that.autoGo,that.autoSpeed);
})
this.lBut.mouseover(function(){
clearInterval(auto);
if(that.num==that.img.width()){
that.num=0;
that.box.animate({right:"0px"},0);
}
});
this.lBut.mouseout(function(){
auto=setInterval(that.autoGo,that.autoSpeed);
});
this.rBut.mouseover(function(){
clearInterval(auto);
if(that.num==0){
that.num=that.img.width();
that.box.animate({right:that.img.width()+"px"},0);
}
});
this.rBut.mouseout(function(){
auto=setInterval(that.autoGo,that.autoSpeed);
if(that.num==that.img.width()){
that.num=0;
that.box.animate({right:"0px"},0);
}
});
},
/*单击左侧按钮,图片向左滚动*/
leftScroll:function(){
var that=this;
this.lBut.click(function(){
that.num+=that.imgWidth;
that.box.animate({right:"+="+that.imgWidth+"px"},that.speed);
if(that.num>=that.img.width()){
that.num=0;
that.box.animate({right:"0px"},0);
}
});
},
/*单击右侧按钮,图片向右滚动*/
rightScroll:function(){
var that=this;
this.rBut.click(function(){
that.num-=that.imgWidth;
that.box.animate({right:"-="+that.imgWidth+"px"},that.speed);
if(that.num<=0){
that.num=that.img.width();
that.box.animate({right:that.img.width()+"px"},0);
}
});
}
}
var a=new marquee("div","img","but1","but2",200,300,2000);//初始化对象
a.autoScroll();
a.leftScroll();
a.rightScroll();
});
</script>
</body>
</html>
来源：https://www.cnblogs.com/doosmile/archive/2011/12/28/2305033.html