Cross-browser CSS Grayscale snippet

.grayscale {
    filter: grayscale(100%); // General Grayscale support
    -webkit-filter: grayscale(100%); //Webkit Browser Support
    -moz-filter: grayscale(100%); // Mozilla Firefox Support
    -ms-filter: grayscale(100%); // IE Support
    -o-filter: grayscale(100%); // Opera Browser Support
    filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); /* Firefox 10+, Firefox on Android */
    filter: gray; /* IE6-9 */
}