<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>BFC</title>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>图片替换技术</title>
<style type="text/css">
h1 {
width: 168px;
height: 81px;
background: url("京东LOGO.png");
border: 1px solid black;
}
a{
border: 1px solid #ff0000;
width: 168px;
height: 81px;
display: block;
text-indent: -1000px;
}
</style>
</head>
<body>
<h1><a href="定位.html">京东</a></h1>
</body>
</html>
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>图片透明效果</title>
<style type="text/css">
img{
opacity: 0.4;
/*background: rgba(0,0,0,0.6);*/
}
img:hover{
opacity: 1;
}
/*此处不能使用rgba改变背景透明的方式来做效果，因为，rgba只针对背景颜色改变，*/
/*而opacity针对是整个元素透明效果的改变*/
</style>
</head>
<body>
<img src="sprites2.png" alt=""/>
</body>
</html>
<style type="text/css">
.out{
width: 200px;
height: 200px;
background: yellow;
overflow: hidden;
}
.in{
width: 100px;
height: 100px;
background: green;
margin-top: 50px;
position: static;
z-index: -1;
}
</style>
</head>
<body>
<div class="out">
<div class="in"></div>
</div>
</body>
</html>
时间： 2024-10-27 07:48:02