<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>圖片寬度自適應</title>
<style type="text/css">
img{
max-width: 100%;//一個max-width解決圖片響應式
}
_img{width:100%;}//兼容IE6
</style>
</head>
<body>
<img src="images/homepage.jpg" alt=""/>
</body>
</html>