Fixes some leakage in the language selector

Signed-off-by: Christopher Rogers <chrissrogers@gmail.com>

source/javascripts/lang_selector.js

@@ -13,21 +13,26 @@ WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 License for the specific language governing permissions and limitations
 under the License.
 */
-languages = []
-function activateLanguage(language) {
+(function (global) {
+  var languages = [];
+
+  global.setupLanguages = setupLanguages;
+  global.activateLanguage = activateLanguage;
+
+  function activateLanguage(language) {
     $("#lang-selector a").removeClass('active');
     $("#lang-selector a[data-language-name='" + language + "']").addClass('active');
     for (var i=0; i < languages.length; i++) {
       $(".highlight." + languages[i]).hide();
     }
     $(".highlight." + language).show();
+  }
 
-}
+  function setupLanguages(l) {
+    var currentLanguage = l[0];
+    var defaultLanguage = localStorage.getItem("language");
 
-function setupLanguages(l) {
     languages = l;
-  currentLanguage = languages[0];
-  defaultLanguage = localStorage.getItem("language");
     
     if ((location.search.substr(1) != "") && (jQuery.inArray(location.search.substr(1), languages)) != -1) {
       // the language is in the URL, so use that language!
@@ -49,4 +54,5 @@ function setupLanguages(l) {
       return false;
     });
 
-}
+  }
+})(window);