无缝滚动在制作一些图片展示的时候还是蛮有用的，下面与大家分享下javascript实现的可改变滚动方向的无缝滚动，具体实现如下，感兴趣的朋友可以参考下哈
代码：
复制代码 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=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{ margin:0; padding:0;}
#imgMove{ height:205px; width:624px; border:#000 1px solid; position:relative; margin:200px auto;overflow:hidden;}
#imgMove ul{ height:205px;position:absolute; left:0; overflow:hidden;}
#imgMove li{ list-style:none; float:left; height:205px; width:156px; margin:0;}
a img,img{ border:none;}
span{ z-index:999;height:68px; width:68px; display:none;position:absolute; cursor:pointer;}
#moveLeft{left:0; top:68px; }
#moveRight{right:-10px; top:68px;}
</style>
<script type="text/javascript">
window.onload=function(){
var oDiv=document.getElementById('imgMove');
var oUl=oDiv.getElementsByTagName('ul')[0];
var oli=oUl.getElementsByTagName('li');
var liSpeed=1;
var ospan=oDiv.getElementsByTagName('span');
var rightmove=document.getElementById('moveRight');
var leftmove=document.getElementById('moveLeft');
function show(){
ospan[0].style.display="block";
ospan[1].style.display="block";
}
oUl.onmouseover=function (){
show();
}
oUl.onmouseout=function(){
ospan[0].style.display="none";
ospan[1].style.display="none";
}
ospan[0].onmouseover=function(){
liSpeed=1;
show();/*加这个函数是为了去除向左向右的图片闪动*/
}
ospan[1].onmouseover=function(){
liSpeed=-1;
show();/*加这个函数是为了去除向左向右的图片闪动*/
}
oUl.style.width=oli[0].offsetWidth*oli.length+'px';;
setInterval(function(){
oUl.style.left=oUl.offsetLeft-liSpeed+'px';
if(oUl.offsetLeft<-oUl.offsetWidth/2){
oUl.style.left=0;
}
else if(oUl.offsetLeft>0)
{
oUl.style.left=-oUl.offsetWidth/2+'px';
}
},30)
}
</script>
</head>
<body>
<div>
<ul>
<li><a href="#"><img src="https://www.jb51.net/images/1.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/2.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/3.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/4.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/1.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/2.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/3.png" /></a></li>
<li><a href="#"><img src="https://www.jb51.net/images/4.png" /></a></li>
</ul>
<span><img src="https://www.jb51.net/images/left.png" /></span>
<span><img src="https://www.jb51.net/images/right.png" /></div>
</div>
</body>
</html>
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