diff --git a/scripts/main.js b/scripts/main.js
new file mode 100644
index 0000000..4caa067
--- /dev/null
+++ b/scripts/main.js
@@ -0,0 +1,25 @@
+/**
+ * Common declarations
+ *
+ *  Copyright (C) 2012  Mike Gerwitz
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+window.ltjs      = {};
+window.Class     = easejs.Class;
+window.Interface = easejs.Interface;
+
+// alert the user on all uncaught errors
+window.onerror = alert;
diff --git a/test/ltgloader-demo.html b/test/ltgloader-demo.html
index 85d34fe..4fce165 100644
--- a/test/ltgloader-demo.html
+++ b/test/ltgloader-demo.html
@@ -77,13 +77,6 @@
 
     <script src="../scripts/ease.min.js"></script>
     <script>
-      window.ltjs  = {};
-      window.Class     = easejs.Class;
-      window.Interface = easejs.Interface;
-
-      // alert the user on all uncaught errors
-      window.onerror = alert;
-
       var ctx    = document.getElementById( 'canvas' ).getContext( '2d' ),
           ctxmap = document.getElementById( 'canvas_map' ).getContext( '2d' ),
           ltg    = document.getElementById( 'ltg' ),
@@ -254,6 +247,7 @@
       // invoke immediately, as we may have a filename prefilled from a refresh
       ltgChange();
     </script>
+    <script src="../scripts/main.js"></script>
     <script src="../lib/TileDfn.js"></script>
     <script src="../lib/ClassicTileDfn.js"></script>
     <script src="../lib/LtgLoader.js"></script>