ayuda con javascript

[vesvello]

este es mi problema. En mi pagina tengo creado o siguiente:

<script type="text/javascript">
<!--
var TabbedPanels1 = new Spry.Widget.TabbedPanels("TabbedPanels1");
var TabbedPanels2 = new Spry.Widget.TabbedPanels("TabbedPanels2");
//-->


y en el archivo js lo siguiente:

Spry.Widget.TabbedPanels = function(element, opts)
{
this.element = this.getElement(element);
this.defaultTab = 0; // Show the first panel by default.
this.bindings = [];
this.tabSelectedClass = "TabbedPanelsTabSelected";
this.tabHoverClass = "TabbedPanelsTabHover";
this.tabFocusedClass = "TabbedPanelsTabFocused";
this.panelVisibleClass = "TabbedPanelsContentVisible";
this.focusElement = null;
this.hasFocus = false;
this.currentTabIndex = 0;
this.enableKeyboardNavigation = true;

la cuestion es que esta parte :

this.tabSelectedClass = "TabbedPanelsTabSelected";
this.tabHoverClass = "TabbedPanelsTabHover";
this.tabFocusedClass = "TabbedPanelsTabFocused";

solo quiero que la ejecute cuando
var TabbedPanels1 = new Spry.Widget.TabbedPanels("TabbedPanels1");

imaginao seria algo asi

if (this = "TabbedPanels11")
{ this.tabSelectedClass = "TabbedPanelsTabSelected";
this.tabHoverClass = "TabbedPanelsTabHover";
this.tabFocusedClass = "TabbedPanelsTabFocused";}


alguna ayuda?