This does work nearly correct :-)
<script type="text/javascript" src="google_javascript/wagmp_maps.js">/*wagmp*/</script>
<script type="text/javascript">
<!--
var TabbedPanels1 = new Spry.Widget.TabbedPanels("TabbedPanels1", {defaultTab:1});
window.onload = function(){ TabbedPanels1.showPanel(0); };
// TabbedPanels1.showPanel(0);
//-->
</script>