/*html{
    /*-webkit-filter: grayscale(100%); /* webkit */
    /*-moz-filter: grayscale(100%); /*firefox*/
    /*-ms-filter: grayscale(100%); /*ie9*/
    /*-o-filter: grayscale(100%); /*opera*/
    /*filter: grayscale(100%);
    /*filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
    /*filter:gray; /*ie9- */
/*}*/