Tab navigation

Please see the attachment

Suppose control is @ Purpose TextField, When i press tab key..Control will go to CollapseIcon of the Party Panel,but My requirement is control should go to Party panel Party Id TextField,I used below mentioned code.But it wont work fine..If i disable showCollapseIcon(i.e.,showCollapseIcon:false) of the Party Panel it is working fine..But I need collapse Icon too.How to do it ..Please Help me out

PartyPanel.addDelegate({

            onAfterRendering: function() {

                $("#PartyPanel").attr("tabindex", -1);

            }

        });

Thanks & Regards

Raghuraj