CSS Margin Shorthands

The margin shorthands can have one to four shorthand styles:

margin:top_right_bottom_left;
example:
margin:10px;

margin:top right bottom left;
example:
margin: 10px 11px 12px 13px

margin:top, left_right, bottom 50px 75px;
example:
margin: 10px 13px 15px

margin:top_bottom, left_right
example:
margin: 10px 20px