Javascript and Marker

noun

• Some conspicuous object used to distinguish or mark something.
  • usage: "the buoys were markers for the channel"
• A distinguishing symbol.
  • usage: "the owner's mark was on all the sheep"
  • synonyms: marking, mark
• A writing implement for making a mark. .

• (n.) The soldier who forms the pilot of a wheeling column or marks the direction of an alignment.
• (n.) A counter used in card playing and other games.
• (n.) One who keeps account of a game played, as of billiards.
• (n.) One who or that which marks.
• (n.) An attachment to a sewing machine for marking a line on the fabric by creasing it.

(DoD, NATO) In land mine warfare: See gap marker; intermediate marker; lane marker; row marker; strip marker.
(DoD, NATO) A visual or electronic aid used to mark a designated point.
(DoD, NATO) In naval operations, a maritime unit which maintains an immediate offensive or obstructive capability against a specified target.