css 使图片变模糊

.blur { 
     filter: url(blur.svg#blur); /* FireFox, Chrome, Opera */
     -webkit-filter: blur(10px); /* Chrome, Opera */ 
     -moz-filter: blur(10px);
     -ms-filter: blur(10px); 
     filter: blur(10px);
     filter: progid:DXImageTransform.Microsoft.Blur(PixelRadius=10, MakeShadow=false); /* IE6~IE9 */
}