Basic key listener

welcome.php

			function keyListener () {
				var $next;

//				if (event.keyCode === 37) { // left
//
//				}
				if (event.keyCode === 38) { // up
					$next = $customerTypeOptionsItems.find('.active').prev();

					if ($next.length === 0) {
						$next = $customerTypeOptionsItems.last();
					}
				}
//				if (event.keyCode === 39) { // right
//
//				}
				else if (event.keyCode === 40) { // down
					$next = $customerTypeOptionsItems.find('.active').next();

					if ($next.length === 0) {
						$next = $customerTypeOptionsItems.first();
					}
				}
				else if (event.keyCode === 13 || event.keyCode === 27) { // enter or escape
					$customerTypeInput.blur();
					return;
				}
				else {
					return;
				}

				$customerTypeInput.val($next.text());
				$customerTypeOptionsItems.removeClass('active');
				$next.addClass('active');
			}