a:hover-->onmouse(filter)_hover onmouse-优快云博客

本文链接：https://blog.youkuaiyun.com/lnn2007/article/details/6802310

本文探讨了使用CSS hover属性实现元素悬停时颜色变化的效果，并对比了不同方法对颜色深浅的影响，包括使用a:hover和div:hover的区别。

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<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style>
div{
width:100px;
height:200px;
position:relative;
border:1px solid black;
}
div a span{
position:absolute;
top:50px;
left:50px;
display:none;
width:100%;
height:100%;
}
div a:hover {
text-decoration:none;
}
div a:hover span{
 display:block;
 background-color:#cccccc;
 color:#FFFFFF;
 filter:alpha(opacity=60);
 opacity:0.6;
}
div:hover{
background-color:#cccccc;
}
</style>
</head>

<body>
<div id="i1" >
<a href="tu.jpg">aaa<span style="position:absolute;top:50px;left:50px">这个好看吗？</span></a>
</div>
<div >abc</div>
</body>
</html>

<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style>
#i1{
width:100px;
height:200px;
border:1px solid black;
position:relative;
}
#i11{
width:100%;
height:100%
position:absolute;
left:50px;
top:50px;
background-color:#000000;
filter:alpha(opacity=60);
opacity:0.6;
display:none;
}
</style>
<script>
function show(){
var i11 = document.getElementById("i11");
i11.style.display = "block";
}
</script>
</head>

<body>
<div onmousemove="show()" id="i1">def<div id="i11">abc</div></div>
</body>
</html>