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