.comment_icon{background-repeat: no-repeat;}
div.comment_icon{width:14px;height:13px;display:inline-block}
.comment_icon.add{background-position: 0px 0px}
.comment_icon.close{background-position: 0px -16px}
.comment_icon.show{background-position: 0px -32px}
.comment_icon.close_dark{background-position: 0px -48px}