$(document).ready(function () {
	$(document).keydown(function (event) {
		if (event.ctrlKey) {
			if (event.which == 37) {
				if ($('a[@class="prev"]').attr('href')) {
					window.location = $('a[@class="prev"]').attr('href');
				}
			}
			if (event.which == 38) {
				if ($('a[@class="up"]').attr('href')) {
					window.location = $('a[@class="up"]').attr('href');
				}
			}
			if (event.which == 39) {
				if ($('a[@class="next"]').attr('href')) {
					window.location = $('a[@class="next"]').attr('href');
				}
			}
		}
	});
});