.

templates/templates-parts/iai/footer-javascript.php

@@ -78,7 +78,7 @@
                     $('.iai-nav').removeClass('opened');
                 });
 
-                if(anchor1 && anchor2 && anchor3 && anchor4){
+                if(anchor1.offset().top && anchor2.offset().top && anchor3.offset().top && anchor4.offset().top){
                   $(window).on("scroll", function()
                   {
                       var scrolltop = $(this).scrollTop();