背景图片大小自动适应DIV

.imgDiv{

width:500px;

height:500px;

background-image:url('../images/index.jpg');

-moz-background-size:100%100%;

-o-background-size:100%100%;

-webkit-background-size:100%100%;

background-size:100%100%;

-moz-border-image:url(./btn.png)0;

background-repeat:no-repeat\9;

background-image:none\9;

filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../images/index.jpg', sizingMethod='scale')\9;

}