diff --git a/core/misc/dropbutton/dropbutton.js b/core/misc/dropbutton/dropbutton.js
index 91fbfdd..4c48f72 100644
--- a/core/misc/dropbutton/dropbutton.js
+++ b/core/misc/dropbutton/dropbutton.js
@@ -27,17 +27,18 @@
    */
   function dropbuttonClickHandler(e) {
     e.preventDefault();
-    // dropbutton object
+    // Dropbutton object.
     var $this = $(e.target).closest('.dropbutton-wrapper');
-    // save offset parent, if element is absolute positioned, we need a relative position for calculation
+    // Save offset parent, if element is absolute positioned, we need a relative
+    // position for calculation.
     var $parent = $this.offsetParent();
-    // forgot parent, if parent is the main HTML object
+    // Forgot parent, if parent is the main HTML object.
     if ($parent[0] == jQuery('html')[0]) { $parent = $this; }
 
-    // open the dropbutton
+    // Open the dropbutton.
     $this.toggleClass('open');
-  
-    // calculate scrolling if opened dropbutton sticking out of viewport
+
+    // Calculate scrolling if opened dropbutton sticking out of viewport.
     if ($parent.position()) {
       if ($parent.position().top + $this.height() > $(window).scrollTop() + (window.innerHeight)) {
         $('html, body').animate({