Use DOM methods instead of jQuery in common example script

config/examples/example.html

@@ -17,7 +17,7 @@
 
     <div class="navbar navbar-inverse navbar-fixed-top">
       <div class="navbar-inner">
-        <div class="container">
+        <div class="container" id="navbar-inner-container">
           <a class="brand" href="./"><img src="./resources/logo-70x70.png"> OpenLayers 3 Examples</a>
         </div>
       </div>

examples/resources/example-behaviour.js

@@ -13,7 +13,7 @@
   if (window.location.host === 'localhost:3000') {
     return;
   }
-  var container = $('.navbar .navbar-inner .container')[0],
+  var container = document.getElementById('navbar-inner-container'),
       form = document.createElement('form'),
       select = document.createElement('select'),
       possibleModes = {