Flush existing classes
diff --git a/js/build_page.js b/js/build_page.js
index 7aa08da..3b2745f 100644
--- a/js/build_page.js
+++ b/js/build_page.js
@@ -113,6 +113,11 @@
var duplicateSubjectBoolNext, duplicateSubjectBoolPrev;
var duplicateSubjectCounter = 0;
+ // Flush existing classes
+ document.querySelectorAll('.message').forEach(function(classe) {
+ classe.classList.add('is-hidden');
+ });
+
for (var [i, classe] of classes.entries()) {
var hora_inici = formatDate(new Date(parseInt(classe.begins)*1000));
var hora_final = formatDate(new Date(parseInt(classe.ends)*1000));