fix missing existence check

themes/infinity-hugo/static/js/main.js

@@ -33,6 +33,8 @@ $(document).ready(function(){
     $hour = $('#countdown_dashboard').data('hour');
     $minute = $('#countdown_dashboard').data('minute');
     $second = $('#countdown_dashboard').data('second');
+
+    if ($('#countdown_dashboard').length > 0) {
         $('#countdown_dashboard').countDown({
             targetDate: {
                 'day':      $day,
@@ -44,6 +46,7 @@ $(document).ready(function(){
             },
             omitWeeks: true
         });
+    }
 
     $(".about-slider").owlCarousel(
         {