Dialog: Fixed reference to bgiframe.

Author: scottgonzalez

demos/dialog/default.html

@@ -5,7 +5,7 @@
 	<title>jQuery UI Dialog - Default functionality</title>
 	<link type="text/css" href="../../themes/base/jquery.ui.all.css" rel="stylesheet" />
 	<script type="text/javascript" src="../../jquery-1.4.2.js"></script>
-	<script type="text/javascript" src="../../external/jquery.bgiframe-2.1.1.js.js"></script>
+	<script type="text/javascript" src="../../external/jquery.bgiframe-2.1.1.js"></script>
 	<script type="text/javascript" src="../../ui/jquery.ui.core.js"></script>
 	<script type="text/javascript" src="../../ui/jquery.ui.widget.js"></script>
 	<script type="text/javascript" src="../../ui/jquery.ui.mouse.js"></script>