diff --git a/ref-test/quiz/static/js/quiz.js b/ref-test/quiz/static/js/quiz.js
index 8410257..a206eb3 100644
--- a/ref-test/quiz/static/js/quiz.js
+++ b/ref-test/quiz/static/js/quiz.js
@@ -16,7 +16,7 @@ $("input[name='bg-select']").change(function(){
 });
 
 $(".bg-select-area").click(function(event){
-    $(this).find("input[name='bg-select']").prop("checked", true)
+    $(this).find("input[name='bg-select']").prop("checked", true).change();
 });
 
 $("#btn-toggle-navigator").click(function(event){