<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>使用图片</title>
<style type="text/css">
img{
width: 60%;
height: 50%;
}
</style>
</head>
<body>
<img src="http://anshun.wedsoso.com/uploadfile/1302/11301221423571361427837432.jpg" >
</body>
</html>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>使用图片</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<style type="text/css">
img{
width: 60%;
height: 50%;
}
</style>
</head>
<body>
<img src="http://anshun.wedsoso.com/uploadfile/1302/11301221423571361427837432.jpg" >
<script type="text/javascript">
$("img").width(document.documentElement.clientWidth*0.6);
$("img").height(document.documentElement.clientHeight*0.5);
$(window).resize(function() {
$("img").width(document.documentElement.clientWidth*0.6);
$("img").height(document.documentElement.clientHeight*0.5);
});
</script>
</body>
</html>
使用百分比设置自动缩放图片的小技巧,布布扣,bubuko.com
原文：http://www.cnblogs.com/Hfive/p/3892834.html