<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>无缝滚动</title>
<style type="text/css">
body,ul,li{margin:0;padding:0}
ul{list-style:none;}
.slide{
width:500px;
height:100px;
border:1px solid #ddd;
margin:20px auto 0;
position:relative;
overflow:hidden;
}
.slide ul{
position:absolute;/*相对于slide进行绝对定位*/
width:1000px;/*比slide宽度大一倍，做这种连续滚动效果的时候，要在后面把内容复制一份*/
height:100px;
left:0;/*可以改变该值让其动起来*/
top:0;
}
.slide ul li{
width:90px;
height:90px;
margin:5px;
background-color:#ccc;
line-height:90px;
text-align: center;
font-size:30px;
float:left;
}
.btns{
width:500px;
height:50px;
margin:10px auto 0;
}
</style>
<script type="text/javascript" src="../js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(function(){
var $ul = $('#slide ul');
var left = 0;
var deraction = 2;//每次滚动的距离
//内容为两套li
$ul.html($ul.html() + $ul.html());
//反复循环定时器，30ms动一下可以看起来比较平滑
var timer = setInterval(move, 30);
function move(){
left -= deraction;
//当第2套li完全显示出来的时候，整个移回原点重新移动，实现向左连续滚动
if(left < -500){
left = 0;
}
//瞬间跳回，实现向右连续滚动
if(left > 0){
left = -500;
}
$ul.css({left: left});
}
$('#btn1').click(function() {
deraction = 2;
});
$('#btn2').click(function() {
deraction = -2;
});
$('#slide').mouseover(function() {
clearInterval(timer);
});
$('#slide').mouseout(function() {
timer = setInterval(move,30);
});
})
</script>
</head>
<body>
<div class="btns">
<input type="button" name="" value="向左" id="btn1">
<input type="button" name="" value="向右" id="btn2">
</div>
<div class="slide" id="slide">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</body>
</html>
