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