diff --git a/source/javascripts/lang_selector.js b/source/javascripts/lang_selector.js
index 4e3dbc9..1d0685f 100644
--- a/source/javascripts/lang_selector.js
+++ b/source/javascripts/lang_selector.js
@@ -13,40 +13,46 @@ 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) {
-  $("#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 (global) {
+  var languages = [];
 
-}
+  global.setupLanguages = setupLanguages;
+  global.activateLanguage = activateLanguage;
 
-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!
-    activateLanguage(location.search.substr(1));
-
-    // set this language as the default for next time, if the URL has no language
-    localStorage.setItem("language", location.search.substr(1));
-  } else if ((defaultLanguage !== null) && (jQuery.inArray(defaultLanguage, languages) != -1)) {
-    // the language was the last selected one saved in localstorage, so use that language!
-    activateLanguage(defaultLanguage);
-  } else {
-    // no language selected, so use the default
-    activateLanguage(languages[0]);
+  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();
   }
 
-  // if we click on a language tab, reload the page with that language in the URL
-  $("#lang-selector a").bind("click", function() {
-    window.location.replace("?" + $(this).data("language-name") + window.location.hash);
-    return false;
-  });
+  function setupLanguages(l) {
+    var currentLanguage = l[0];
+    var defaultLanguage = localStorage.getItem("language");
 
-}
+    languages = l;
+    
+    if ((location.search.substr(1) != "") && (jQuery.inArray(location.search.substr(1), languages)) != -1) {
+      // the language is in the URL, so use that language!
+      activateLanguage(location.search.substr(1));
+
+      // set this language as the default for next time, if the URL has no language
+      localStorage.setItem("language", location.search.substr(1));
+    } else if ((defaultLanguage !== null) && (jQuery.inArray(defaultLanguage, languages) != -1)) {
+      // the language was the last selected one saved in localstorage, so use that language!
+      activateLanguage(defaultLanguage);
+    } else {
+      // no language selected, so use the default
+      activateLanguage(languages[0]);
+    }
+
+    // if we click on a language tab, reload the page with that language in the URL
+    $("#lang-selector a").bind("click", function() {
+      window.location.replace("?" + $(this).data("language-name") + window.location.hash);
+      return false;
+    });
+
+  }
+})(window);