js实现楼层效果的简单实例
编程学习 2021-07-04 20:00www.dzhlxh.cn编程入门
狼蚁网站SEO优化长沙网络推广就为大家带来一篇js实现楼层效果的简单实例。长沙网络推广觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随长沙网络推广过来看看吧
今天自己写个楼层效果，有一点烦躁，小地方犯错误。各位大神来修改不足啊！！！
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>楼层切换</title>
<style>
*{padding: 0;margin: 0;}
li{list-style: none;}
.main img{width: 850px;height: 700px;float: left;}
.title{width: 850px;height: 50px;text-align: center;line-height: 50px;}
.floor{position: fixed;top: 20px;right: 20px;display: none;}
.floor ul li{width: 70px;height: 30px;text-align: center;line-height: 30px;cursor: hand;cursor: pointer}
.liStyle{background-color: red;}
.loading{background:url("image/loading.gif") no-repeat center center;}
#back{cursor: hand;cursor: pointer;}
</style>
</head>
<body>
<div class="main" id="main">
<h3 class="title">图片欣赏</h3>
<img as="image/1.jpg"/>
<img as="image/2.jpg"/>
<img as="image/3.jpg"/>
<img as="image/4.jpg"/>
<img as="image/5.jpg"/>
<img as="image/6.jpg"/>
<img as="image/7.gif"/>
<img as="image/8.jpg"/>
<img as="image/9.jpg"/>
<img as="image/10.jpg"/>
</div>
<div class="floor" id="floor">
<ul id="floorUl">
<li>第一张</li>
<li>第二张</li>
<li>第三张</li>
<li>第四张</li>
<li>第五张</li>
<li>第六张</li>
<li>第七张</li>
<li>第八张</li>
<li>第九张</li>
<li>第十张</li>
</ul>
<p id="back">返回顶部</p></div><script> var main = document.getElementById("main");
var floor = document.getElementById("floor");
var image = main.getElementsByTagName("img");
var floorUl = document.getElementById("floorUl");
var li = floorUl.getElementsByTagName("li");
var back = document.getElementById("back");
window.onload = window.onscroll = function(){
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var height = document.documentElement.clientHeight || document.body.clientHeight;
for(var i = 0;i < image.length; i++){
image[i].className = "loading";
if(delay(image[i]).top < scrollTop + height){
image[i].src = image[i].getAttribute("as");
}
}
if(scrollTop >= image[0].offsetTop){
floor.style.display = "block";
}else {
floor.style.display = "none";
}
var num = 0;
for(var i = 0; i < image.length;i++){
if(scrollTop >= image[i].offsetTop){
num = i;
}
li[i].className = "";
}
li[num].className = "liStyle";
for(var i = 0;i < li.length;i++){
li[i].onclick = function(){
for(var j = 0;j < li.length;j++){
if(this == li[j]){
document.documentElement.scrollTop = image[j].offsetTop;
document.body.scrollTop = image[j].offsetTop;
}
}
}
}
}
var time = null;
back.onclick = function() {
function goBack(){
var ss = document.documentElement.scrollTop || document.body.scrollTop;
ss-=50;
document.documentElement.scrollTop = ss;
document.body.scrollTop = ss;
if(ss<= 0){
clearInterval(time);
}
}
time = setInterval(goBack,1);
}
function delay(obj){
var l = 0;
var t = 0;
while (obj){
l = l + obj.offsetLeft;
t = t + obj.offsetTop;
obj = obj.offsetParent;
}
return{left:l,top:t};
}
</script>
</body>
</html>
以上这篇js实现楼层效果的简单实例就是长沙网络推广分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持狼蚁SEO。