CSS滤镜属性filter让网页变黑白

html {
    filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
    -moz-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
    filter: grayscale(100%);
}