var tabs;
function showtab(){
    Ext.state.Manager.setProvider(new Ext.state.SessionProvider({state: Ext.appState}));
                tabs = new Ext.TabPanel({
                region: 'center',
            margins:'3 3 3 0', 
            activeTab: 0,
			enableTabScroll:true,
            defaults:{autoScroll:true},
            items:[                
                            {
                                title: 'Who is SBF?',
                                html: ''
                            }
                        ,
                            {
                                title: 'Our Mission ',
                                html: ''
                            }
                        ,
                            {
                                title: 'Management Team',
                                html: ''
                            }
                        ,
                            {
                                title: 'Contact Us',
                                html: ''
                            }
                                        ]
            });
            var win = new Ext.Window({
            title: 'About Us',
            closable:true,
            width:655,
            height:350,
            //border:false,
            plain:true,
            layout: 'border',
            items: [tabs]
        });
        win.show();    }