diff --git a/demos/gravity1/gravity1.html b/demos/gravity1/gravity1.html
index a133823..5d7cfc6 100644
--- a/demos/gravity1/gravity1.html
+++ b/demos/gravity1/gravity1.html
@@ -14,7 +14,7 @@
 <link rel="stylesheet" href="https://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
 <script src="https://code.jquery.com/jquery-1.9.1.js"></script>
 <script src="https://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
-<script src="gravity1.js" ></script>
+<script type="text/javascript" src="gravity1.js" ></script>
 <link rel="stylesheet" type="text/css" href="gravity1.css" />
 <script type="text/javascript">
 console.log("running inline javascript....");