// use jquery to grab promo data via ajax
function check_promo(promoCode){
	$.ajax({ 
 	method: "get",
		url: "index.php?id=check_promo",
		data: "promo_code="+promoCode+"&promo_discount=1",
		success: function(value){
			$('#cart_promo').val(value);
			$('#promoCode').val(promoCode);
 		} 
	}); //close $.ajax(

 $.ajax({ 
 	method: "get",
		url: "index.php?id=check_promo",
		data: "promo_code="+promoCode,
		success: function(html){
			$('#promo').show();
			$('#promo').html(html);
 		} 
	}); //close $.ajax( 
}

// callback to return list of linked events by course id
function find_events(courseID){
	$.ajax({ 
	 method: "get",
		url: "index.php?id=find_events",
		data: "courseID="+courseID,
		success: function(html){
			$('#events').show();
			$('#events').html(html);
	 	} 
	}); //close $.ajax(
}