window.addEvent("domready", function () {
	//
	var currentPage = location.href.replace(/^.*?(\/calendar\/.*)$/, "$1");
	var monthSelect = $('month-select');
	if (monthSelect) {
		monthSelect.addEvent('change', function () {
			if (monthSelect.selectedIndex == -1) return;
			var opt = monthSelect.options[monthSelect.selectedIndex];
			if (opt && opt.value) {
				var newPage = opt.value.replace(/^.*?(\/calendar\/.*)$/, "$1");
				if (newPage != currentPage) {
					// Jump if different page has selected.
					location.href = opt.value;
				}
			}
		});
	}
});