CSS ??? ??/???
CSS ??? ??/???
CSS? ???? ?? ??? ???? ????.
?? : CSS ???? ??? W3C? CSS3 ?? ??? ?????.
?? 1 - ??? ??? ???
CSS3? ??? ??? opacity???.
?? CSS? ???? ??? ???? ??? ??? ????????.
?? ???
???? ??? ??? ???:
?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
img
{
opacity:0.4;
filter:alpha(opacity=40); /* For IE8 and earlier */
}
</style>
</head>
<body>
<img src="https://img.php.cn/upload/course/000/000/006/580837363b987802.jpg" height="300px" width="300px">
</body>
</html>????? ???? ?????.
?? CSS? ???.
{
??: 0.4 ;
filter:alpha(opacity=40); /* IE8 ??? ?? */
}
IE9, Firefox, Chrome, Opera ? Safari ????? ??? ??? ???? ???? ????? ????. ???? ?? ?? ??? 0.0 - 1.0???. ?? ???? ??? ? ??????.
IE8 ? ?? ????? ??: ??(????=x)? ?????. x? ?? ? ?? ?? 0~100??. ?? ???? ??? ? ??????.
? 2 - ??? ??? - ?? ??
?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
img
{
opacity:0.4;
filter:alpha(opacity=40); /* For IE8 and earlier */
}
img:hover
{
opacity:1.0;
filter:alpha(opacity=100); /* For IE8 and earlier */
}
</style>
</head>
<body>
<img src="https://img.php.cn/upload/course/000/000/006/580837363b987802.jpg" height="300px" width="300px">
</body>
</html>CSS ???:
{
opacity:0.4;
filter:alpha(opacity=40) /* IE8? ?? ??? ?? */
}
img:hover
{
opacity:1.0;
filter:alpha(opacity=100) /* IE8 ??? ?? */
}
? ?? CSS ??? ?? 1? ??? ?????. ?? ???? ??? ? ?? ?? ???? ???? ?? ?? ????? ??????. ? ?? ???? ??? ?? ???? ???? ???? ?????? ????.
? CSS? ??? ????. opacity=1.
IE8 ? ?? ??: filter:alpha(opacity=100).
??? ???? ????? ???? ???? ?? ??????.
? 3 - ??? ??? ?? ???
???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????. ???? ??? ??? ?? ????.
????? ??? ????.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
div.background
{
width:500px;
height:250px;
background:url(https://img.php.cn/upload/course/000/000/006/5809800b44336872.jpg) repeat;
border:2px solid black;
}
div.transbox
{
width:400px;
height:180px;
margin:30px 50px;
background-color: #fcffe0;
border:1px solid black;
opacity:0.6;
filter:alpha(opacity=60); /* For IE8 and earlier */
}
div.transbox p
{
margin:30px 40px;
font-weight:bold;
color:#000000;
}
</style>
</head>
<body>
<div class="background">
<div class="transbox">
<p>人生就像一張紙，行走間，如素箋染墨。每一次經(jīng)歷都是一筆濃墨或淡彩;每一次成功或挫折，每一次心跳都是一個(gè)不同凡響的音符，淡然或張狂，如那枝上的鳥兒，可以自由戀愛，傾心歡唱，即使這素淡的冬日，也有余韻繞梁……
</p>
</div>
</div>
</body>
</html>????? ???? ??? ???
