半透明 转载
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>鼠标经过图片半透明效果，支持Firefox/IE</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
body {background:#000;}
.img_link{filter:alpha(opacity=50); /* IE */
-moz-opacity:0.5; /* Moz + FF */
opacity:0.5; /* 支持CSS3的浏览器（FF 1.5也支持）*/
}
.img_link:hover {
filter:alpha(opacity=100); /* IE */
-moz-opacity:1; /* Moz + FF */
opacity:1; /* 支持CSS3的浏览器（FF 1.5也支持）*/
}
</style>
</head>
<body>
<img class="img_link" src="http://www.tmxhx.com/attachments/month_0808/k2008823103739.jpg" alt="测试效果" onMouseOver="this.className='null'" onMouseOut="this.className='img_link'" />
</body>
</html>
![http://www.tmxhx.com/attachments/month_0808/k2008823103739.jpg"](http://www.tmxhx.com/attachments/month_0808/k2008823103739.jpg"){kind=link}