网站变成黑白模式

html{
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
    _filter:none;    
}