diff --git a/lib/client/menu.js b/lib/client/menu.js
index 28639102..51a48e28 100644
--- a/lib/client/menu.js
+++ b/lib/client/menu.js
@@ -76,6 +76,18 @@ CloudCommander.Menu.set          = (function(){
         var lThis = this;
 
         var lFunc_f = document.onclick;
+        /*
+         * Menu works in some crazy way so need a
+         * little hack to get every thing work out.
+         * When menu shows up, it drawing invisible 
+         * layer wich hides all elements of
+         * Cloud Commander so it could not handle
+         * onclick events. To get every thing work
+         * how expected we hide out invisible layer
+         * so for observer it is nothing special
+         * is not going on. All magic happening in
+         * DOM tree
+         */
         document.onclick = function(pEvent){
             if(pEvent.x && pEvent.y){
                 var lLayer = lThis.getById('context-menu-layer')
@@ -96,6 +108,9 @@ CloudCommander.Menu.set          = (function(){
                 lLayer.style.cssText = lLayer.style.cssText
                     .replace('z-index: -1', 'z-index: 1')
                 
+                /* if document.onclick was set up
+                 * before us, it's best time to call it
+                 */
                 if(typeof lFunc_f === 'function')
                     lFunc_f();
             }