css图片在div中等比缩放

 

<style type="text/css"> 

     .suofang {MARGIN: auto;WIDTH: 200px;} 

     .suofang img{MAX-WIDTH: 100%!important;HEIGHT: auto!important;width:expression(this.width > 200 ? "200px" :     this.width)!important;} 
 
</style> 
 
<body> 
     <div class="suofang"> 
         <img src="> 
     </div> 
</body>