<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>lala</title>
<style>
.stl{
background:#f0f;
}
#imag{
background:#ccc;
}
</style>
</head>
<body>
<img src="a.jpg" height=‘80px‘ width=‘100px‘ class=‘stl‘>
<img src="a.jpg" height=‘80px‘ width=‘100px‘ id=‘imag‘>
<img src="a.jpg" height=‘80px‘ width=‘100px‘>
<img src="a.jpg" height=‘80px‘ width=‘100px‘ class=‘stl‘>
</body>
</html>
原文：http://www.cnblogs.com/lwyy/p/5659295.html