CSS强制按比例缩小图片

<title>CSS强制按比例缩小图片</title>

<style>

img,a img{

border:0;

margin:0;

padding:0;

max-width:200px;

width:expression(this.width>200?"200px":this.width);

max-height:200px;

height:expression(this.height>200?"200px":this.height);

</style>

<img src="/jscss/demoimg/wall3.jpg">