<script type="text/javascript">

        Sys.Application.add_load(function ()
        {
            // ajax control refs

            var vpc = $find('<%= vpc.ClientID %>');
            var ikc = $find('<%= vbc.InhaltsKategorieClientID %>');

            // event handler defs

            var PortalauswahlChanged = function (s, e)
            {
                ikc.Rebind();
            };

            var ResizingHandler = function (s, e)
            {
                ResizeSplitter();
            };

            // event wiring

            vpc.add_selectionChanged(PortalauswahlChanged);

            vpc.add_panelExpanded(ResizingHandler);
            ikc.add_afterRebound(ResizingHandler);
        });

    </script>