<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
body {
height: 5000px;
}
img {
position: fixed;
top: 50%;
margin-top: -220px;
}
.img1 {
left: 10px;
}
.img2 {
right: 10px;
}
div {
width: 800px;
margin: 150px auto;
color: red;
text-align: center;
font: 700 40px/50px "simsun";
}
</style>
<script>
window.onload = function () {
//获取相关元素
var imgArr = document.getElementsByTagName("img");
//设置定时器
setTimeout(fn,5000);
function fn(){
imgArr[0].style.display = "none";
imgArr[1].style.display = "none";
}
}
</script>
</head>
<body>
<img class="img1" src="images/1.gif" alt=""/>
<img class="img2" src="images/2.gif" alt=""/>
<div>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
我为党国流过血,我为抗战立过功,我要见委座,我要见委座,我要见委座!!!啪...<br>
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
* {
padding: 0;
margin: 0;
}
.site-nav {
height: 30px;
background-color: #ccc;
}
.top-banner {
background-color: blue;
}
.w {
width: 1210px;
height: 80px;
background-color: pink;
margin: 0 auto;
position: relative;
}
.search {
width: 1210px;
height: 80px;
background-color: red;
margin: 0 auto;
}
a {
position: absolute;
top: 10px;
right: 10px;
width: 25px;
height: 25px;
text-align: center;
line-height: 25px;
background-color: #000;
color: #fff;
text-decoration: none
}
</style>
</head>
<body>
<div class="site-nav"></div>
<div class="top-banner" style="opacity: 1">
<div class="w">
<a href="#">×</a>
</div>
</div>
<div class="search">
<script>
//需求:点击关闭按钮,先让top-banner这个盒子透明度变为0,紧接着display:none;
//步骤:
//1.获取事件源
//2.绑定事件
//3.书写事件驱动程序(定时器,透明度变为0,清除定时器,并隐藏盒子)
//1.获取事件源
var topBaner = document.getElementsByClassName("top-banner")[0];
var a = topBaner.children[0].firstElementChild || topBaner.children[0].firstChild ;
//定义定时器
var timer = null;
//2.绑定事件
a.onclick = function () {
//3.书写事件驱动程序(定时器,透明度变为0,清除定时器,并隐藏盒子)
timer = setInterval(function () {
topBaner.style.opacity -= 0.1;
if(topBaner.style.opacity<0){
topBaner.style.display = "none";
clearInterval(timer);
}
},50);
}
</script>
</div>
</body>
</html>
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