window.addEvent("domready",function () 
{
	var do_disable = function () 
	{
		if (!$("order_by")) return;

		var order_by = $("order_by").value;
		var order_direction = $("order_direction");

		if (order_by <= 2)
			$("order_direction").setStyle("display","");
		else
		{
			$("order_direction").setStyle("display","none");
			$("order_direction").value = 1;
		}
	}

	do_disable();
	
	if ($("order_direction")) $("order_direction").addEvent("change",do_disable);
	if ($("order_by")) $("order_by").addEvent("change",do_disable);
});