简单无缝滚动轮播图
缺点: 耦合性比较强
<!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" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.scroll{
position: relative;
width: 830px;
height: 130px;
border: 10px solid #000;
margin: 100px auto;
overflow: hidden;
}
.scroll ul{
position: absolute;
top: 0;
left: 0;
width: 5000px;
height: 130px;
}
.scroll ul li{
float: left;
width: 200px;
height: 130px;
margin-right: 10px;
overflow: hidden;
}
</style>
</head>
<body>
<div class="scroll" id="scroll">
<ul id="munit">
<li><img src="images/shuzi/0.png" alt="" /></li>
<li><img src="images/shuzi/1.png" alt="" /></li>
<li><img src="images/shuzi/3.png" alt="" /></li>
<li><img src="images/shuzi/4.png" alt="" /></li>
<li><img src="images/shuzi/5.png" alt="" /></li>
<li><img src="images/shuzi/6.png" alt="" /></li>
<li><img src="images/shuzi/7.png" alt="" /></li>
<li><img src="images/shuzi/0.png" alt="" /></li>
<li><img src="images/shuzi/1.png" alt="" /></li>
<li><img src="images/shuzi/3.png" alt="" /></li>
<li><img src="images/shuzi/4.png" alt="" /></li>
<li><img src="images/shuzi/5.png" alt="" /></li>
<li><img src="images/shuzi/6.png" alt="" /></li>
<li><img src="images/shuzi/7.png" alt="" /></li>
</ul>
</div>
<script>
// 获取元素
var scroll = document.getElementById("scroll");
var munit = document.getElementById("munit");
//初始位置 (自己进行滚动播放)
var nowLeft = 0;
//折返点
var back = -1470;
var timer;
timer = setInterval(run,10);
//鼠标移上 scroll 元素，让运动停止
scroll.onmouseover = function(){
clearInterval(timer);
};
//鼠标离开 scroll 元素，让运动重新开始
scroll.onmouseout = function(){
timer = setInterval(run,10);
};
//运动函数
function run (){
//nowLeft自减
nowLeft -= 2;
// 每次都要判断，是否走到了折返点，如果走到了，瞬间切换到 0
if(nowLeft <= back){
nowLeft = 0;
}
munit.style.left = nowLeft + "px";
}
</script>
</body>
</html>
