JW Player - Stop other videos when playing

gistfile1.js

(function($) {
	/**
	 * We have to get a collection of id's because the HTML5 player moves the DOM
	 * around and returns different elements when caching the selectors.
	*/
	var elements  = $('.video-player > div, .video-player object'),
	    playerIds = [];
	
	elements.each(function(i, player) {
		playerIds.push(player.id);
	});
	
	$.each(playerIds, function(i, id) {
		jwplayer(id).onPlay(function() {
			$.each(playerIds, function(x, pid) {
				if (id === pid)
					return true;
					
				jwplayer(pid).stop();
			});
		});
	});
})(jQuery);

Sorry I am pretty new to JS. Where should I put this code?

Thank you.
Tse