#toplevel_page_unique-cursor div.wp-menu-image {
	background: transparent url(../images/icon.png) no-repeat  scroll center 0;
}

#toplevel_page_unique-cursor:hover div.wp-menu-image,
#toplevel_page_unique-cursor.current .wp-menu-image {
	background: transparent url(../images/icon.png) no-repeat  scroll center -28px;
}