在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(cainiaoplay.com)</title>
<style>div.background
{
  width: 500px;
  height: 250px;
  background: url(klematis.jpg.html) repeat;
  border: 2px solid black;
}
div.transbox
{
  width: 400px;
  height: 180px;
  margin: 30px 50px;
  background-color: #ffffff;
  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>This is some text that is placed in the transparent box.
This is some text that is placed in the transparent box.
This is some text that is placed in the transparent box.
This is some text that is placed in the transparent box.
This is some text that is placed in the transparent box.
</p>
</div>
</div>
</body>
</html>
源代码

动行结果
