<title>无标题文档
</title>
<style>
* {margin:0; padding:0;}
#div1{width:1172px; height:220px; margin:100px auto; position:relative; background:red; overflow:hidden;}
#div1 ul li{float:left;width:293px; height:220px; list-style:none; }
</style>
<script>
window.onload=function ()
{
var oDiv=document.getElementById('div1');
var oUl=oDiv.getElementsByTagName('ul')[0];
var aLi=oUl.getElementsByTagName('li');
var timer;
var speed=-2;
oUl.innerHTML=oUl.innerHTML+oUl.innerHTML;
oUl.style.width=aLi[0].offsetWidth*aLi.length+'px';
function move(){
if(oUl.offsetLeft<-oUl.offsetWidth/2)
{
oUl.style.left=0;
}
if(oUl.offsetLeft>0)
{
oUl.style.left=-oUl.offsetWidth/2+'px';
}
oUl.style.left=oUl.offsetLeft+speed+'px';
};
oDiv.onmouseover=function ()
{
clearInterval(timer);
}
oDiv.onmouseout=function ()
{
timer=setInterval(move,30);
}
document.getElementsByTagName('a')[0].onclick=function ()
{
speed=-2;
}
document.getElementsByTagName('a')[1].onclick=function ()
{
speed=2;
}
};
</script>
</head>
<body>
<a href="javascript:;">向左滚
</a>
<a href="javascript:;">向右滚
</a>
<div id="div1">
<ul style="position:absolute; left:0; top:0;">
<li><img src="images/05.jpg"/></li>
<li><img src="images/05.jpg"/></li>
<li><img src="images/05.jpg"/></li>
<li><img src="images/05.jpg"/></li>
</ul>
</div>
</body>
一开始遇到了个问题，ul的样式是外部样式，所以代码oUl.style.left=oUl.offsetLeft-2+'px'有问题，程序跑不了，style不能取外部样式，谨记！
定时器开启定时器setInterval 间隔型setTimeout 延时型停止定时器clearIntervalclearTimeout
转载于:https://www.cnblogs.com/919czzl/p/4314066.html
相关资源：文字列表无缝向上滚动
