Top to bottom gradient Mixin in less

mixin_top_to_bottom_gradient.less

.top-to-bottom-gradient (@top-color, @bottom-color) {
  background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(@top-color), to(@bottom-color)); /* Safari 4-5, Chrome 1-9 */
  background: -webkit-linear-gradient(top, @top-color, @bottom-color);                       /* Safari 5.1, Chrome 10+ */
  background: -moz-linear-gradient(top, @top-color, @bottom-color);                          /* Firefox 3.6+ */
  background: -ms-linear-gradient(top, @top-color, @bottom-color);                           /* IE 10 */
  background: -o-linear-gradient(top, @top-color, @bottom-color);                            /* Opera 11.10+ */
}