Return true on show/hide success

hinter.js

@@ -2,7 +2,7 @@
 
    Homepage: http://yourcmc.ru/wiki/SimpleAutocomplete
    License: MPL 2.0+ (http://www.mozilla.org/MPL/2.0/)
-   Version: 2014-09-04
+   Version: 2014-09-05
    (c) Vitaliy Filippov 2011-2014
 
    Usage:
@@ -377,7 +377,10 @@ SimpleAutocomplete.prototype.hide = function()
     if (!this.persist)
     {
         if (!this.skipHideCounter)
+        {
             this.hintLayer.style.display = 'none';
+            return true;
+        }
         else
             this.skipHideCounter = 0;
     }
@@ -392,6 +395,7 @@ SimpleAutocomplete.prototype.show = function()
         this.hintLayer.style.top = (p.top+this.input.offsetHeight) + 'px';
         this.hintLayer.style.left = p.left + 'px';
         this.hintLayer.style.display = '';
+        return true;
     }
 };
 
@@ -563,21 +567,6 @@ SimpleAutocomplete.GlobalMouseDown = function(ev)
 // *** UTILITY FUNCTIONS ***
 // Remove this section if you already have these functions defined somewhere else
 
-// Cross-browser add/remove event listeners
-var addListener = function()
-{
-    return window.addEventListener
-        ? function(el, type, fn) { el.addEventListener(type, fn, false); }
-        : function(el, type, fn) { el.attachEvent('on'+type, fn); };
-}();
-
-var removeListener = function()
-{
-    return window.removeEventListener
-        ? function(el, type, fn) { el.removeEventListener(type, fn, false); }
-        : function(el, type, fn) { el.detachEvent('on'+type, fn); };
-}();
-
 // Cancel event bubbling and/or default action
 var stopEvent = function(ev, cancelBubble, preventDefault)
 {
@@ -594,15 +583,6 @@ var stopEvent = function(ev, cancelBubble, preventDefault)
     return !preventDefault;
 };
 
-// Remove leading and trailing whitespace
-if (!String.prototype.trim)
-{
-    String.prototype.trim = function()
-    {
-        return this.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
-    };
-}
-
 // Get element position, relative to the top-left corner of page
 var getOffset = function(elem)
 {