无缝滚动用以网站图片横向自动滚动浏览
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
*{
margin: 0;padding: 0;
}
img{
height:168px;
width: 200px;
}
li{
list-style: none;
float: left;
}
#div1{
height: 168px;
width: 800px;
margin: 100px auto;
position: relative;
overflow: hidden;
}
ul{
position: absolute;
left: 0;
top: o;
}
</style>
</head>
<body>
<a href="javascript:;">向左</a>
<a href="javascript:;">向右</a>
<a href="javascript:;">加速</a>
<a href="javascript:;">减速</a>
<div id="div1">
<ul>
<li><img src="照片/桥.jpg"></li>
<li><img src="照片/彩虹.jpg"></li>
<li><img src="照片/窗户.jpg"></li>
<li><img src="照片/烟雾.jpg"></li>
</ul>
</div>
</body>
<script>
var oDiv=document.getElementById('div1');
var oUl=oDiv.getElementsByTagName('ul')[0];
var aLi=oUl.getElementsByTagName('li');
var speed=2;
oUl.innerHTML=oUl.innerHTML+oUl.innerHTML;
oUl.style.width=aLi[0].offsetWidth*aLi.length+'px';
function move(){
//向左滚动
if(oUl.offsetLeft<-oUl.offsetWidth/2)
oUl.style.left='0';
// oUl.style.left=oUl.offsetLeft-2+'px';
//向右滚动
if(oUl.offsetLeft>0)
oUl.style.left=-oUl.offsetWidth/2+'px';
oUl.style.left=oUl.offsetLeft+speed+'px';
}
var timer=setInterval(move,30)
oDiv.onmouseover=function(){
clearInterval(timer);
}
oDiv.onmouseout=function(){
timer=setInterval(move,30);
}
//向左滚动
document.getElementsByTagName('a')[0].onclick=function(){
speed=-2;
}
//向右滚动
document.getElementsByTagName('a')[1].onclick=function(){
speed=2;
}
//加速滚动
document.getElementsByTagName('a')[2].onclick=function(){
speed=speed+speed;
}
//减速滚动
document.getElementsByTagName('a')[3].onclick=function(){
speed=speed/2;
}
</script>
</html>
1
offsetleft:用于获取物体左边距
offsetTop:用于获取物体上边距
offsetlWidth:用于获取物体宽度
2
innerHTML用于获取标签内的内容
3
<a href="javascript:;"></a>
在执行该段代码时,去执行<script>里调用该便签的代码
4
margin:0px auto;