SASS cross-browser animation mixins

animation.scss

@mixin keyframes( $animationName ) {
    @-webkit-keyframes $animationName {
        @content;
    }
    @-moz-keyframes $animationName {
        @content;
    }
    @-o-keyframes $animationName {
        @content;
    }
    @keyframes $animationName {
        @content;
    }
}

@mixin animation( $args ) {
	-webkit-animation: $args;
	-khtml-animation: $args;
	-moz-animation: $args;
	-ms-animation: $args;
	-o-animation: $args;
	animation: $args;
}