CSS3 Grayscale filter: copy&paste!

/* No styles */

.grayscale { 
  -webkit-filter: grayscale(100%);
  -moz-filter: grayscale(100%);
  -ms-filter: grayscale(100%);
  -o-filter: grayscale(100%);
  filter: grayscale(100%);
  filter: url(grayscale.svg);
  filter: gray; /* IE 6-9 */
}