Rename private attribute _element to _el

Change-Id: I9c7a31bd6844636737ffa6456562b997f5e370a3
diff --git a/dev/js/spec/menuSpec.js b/dev/js/spec/menuSpec.js
index a2ca40b..12a8fc1 100644
--- a/dev/js/spec/menuSpec.js
+++ b/dev/js/spec/menuSpec.js
@@ -74,8 +74,8 @@
       },
       element : function () {
         // already defined
-        if (this._element !== undefined)
-	        return this._element;
+        if (this._el !== undefined)
+	        return this._el;
 
         // Create list item
         var li = document.createElement("li");
@@ -93,7 +93,7 @@
 	        desc.appendChild(document.createTextNode(this._desc));
 	        li.appendChild(desc);
         };
-        return this._element = li;
+        return this._el = li;
       }
     };