// http://web-design-weekly.com/2013/05/12/handy-sass-mixins/
@mixin abs-pos ($top: auto, $right: auto, $bottom: auto, $left: auto)
	top: $top
	right: $right
	bottom: $bottom
	left: $left
	position: absolute

/* 
	// Usage 
    .abs
  		@include abs-pos(10px, 10px, 5px, 15px);

*/