Flash/blink elements by fading in/out. Use it with care!

jquery.flash.js

$.fn.flash = function (options) {
  options = $.extend({
		animation: 200,
		off: 0,
		on: 1000
	}, options || {});
	var elems = $(this),
		f = function () {
			elems
				.animate({opacity: 0}, options.animation)
				.delay(options.off)
				.animate({opacity: 1}, options.animation)
				.queue(function () {
					setTimeout(f, options.on);
					$(this).dequeue();
				});
		};
	setTimeout(f, options.on);
};