图片循环滚动代码(无缝滚动)(分别向上、下、左、右)

向上：程序代码
<div id=demo style="overflow:hidden; width:128px; height:300px;"> 
<div id=demo1> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
</div> 
<div id=demo2></div> 
</div> 
<script language="javascript"> 
var speed=30 
demo2.innerHTML=demo1.innerHTML 
function Marquee(){ 
if(demo2.offsetTop-demo.scrollTop<=0) 
demo.scrollTop-=demo1.offsetHeight 
else{ 
demo.scrollTop++ 
} 
} 
var MyMar=setInterval(Marquee,speed) 
demo.onmouseover=function() {clearInterval(MyMar)} 
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)} 
</script> 


向下：程序代码
<div id=demo style="overflow:hidden; width:128px; height:300px;"> 
<div id=demo1> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
<img src="gfjs.gif"><br><img src="bxtt.gif"><br><img src="bzjd.gif"><br> 
</div> 
<div id=demo2></div> 
</div> 
<script language="javascript"> 
var speed=30 
demo2.innerHTML=demo1.innerHTML 
demo.scrollTop=demo.scrollHeight 
function Marquee(){ 
if(demo1.offsetTop-demo.scrollTop>=0) 
demo.scrollTop+=demo2.offsetHeight 
else{ 
demo.scrollTop-- 
} 
} 
var MyMar=setInterval(Marquee,speed) 
demo.onmouseover=function() {clearInterval(MyMar)} 
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)} 
</script> 


向左：程序代码
<div id=demo style="overflow:hidden;height:100px;width:300px;"><table align=left 
cellpadding=0 cellspace=0 border=0><tr><td id=demo1 valign=top><img src="gfjs.gif"><img 
src="bxtt.gif"><img src="bzjd.gif"><img src="gfjs.gif"><img src="bxtt.gif"><img 
src="bzjd.gif"></td><td id=demo2 valign=top></td></tr></table></div> 
<script> 
var speed=30 
demo2.innerHTML=demo1.innerHTML 
function Marquee(){ 
if(demo2.offsetWidth-demo.scrollLeft<=0) 
demo.scrollLeft-=demo1.offsetWidth 
else{ 
demo.scrollLeft++ 
} 
} 
var MyMar=setInterval(Marquee,speed) 
demo.onmouseover=function() {clearInterval(MyMar)} 
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)} 
</script> 




向右：程序代码
<div id=demo style="overflow:hidden;height:100px;width:300px;"><table align=left 
cellpadding=0 cellspace=0 border=0><tr><td id=demo1 valign=top><img src="gfjs.gif"><img 
src="bxtt.gif"><img src="bzjd.gif"><img src="gfjs.gif"><img src="bxtt.gif"><img 
src="bzjd.gif"></td><td id=demo2 valign=top></td></tr></table></div> 
<script> 
var speed=30 
demo2.innerHTML=demo1.innerHTML 
demo.scrollLeft=demo.scrollWidth 
function Marquee(){ 
if(demo.scrollLeft<=0) 
demo.scrollLeft+=demo2.offsetWidth 
else{ 
demo.scrollLeft-- 
} 
} 
var MyMar=setInterval(Marquee,speed) 
demo.onmouseover=function() {clearInterval(MyMar)} 
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)} 
</script> 

来源：https://www.cnblogs.com/breezeblew/archive/2009/03/23/1420101.html