splitWindow

var win = Ti.UI.createWindow({backgroundColor: '#FFFFFF', tabBarHidden:true, title: '素敵な右側'});
var detailNav = Ti.UI.iOS.createNavigationWindow({window:win});

var masterWindow = Ti.UI.createWindow({backgroundColor:'#FFFFFF', tabBarHidden:true, title:'ナイス左側'});
var rows = [];
for( var i = 0; i < 5; i++ ){
    rows.push(Ti.UI.createTableViewRow({
        title: "title " + (i+1),
        hasChild: true
    }));
}
masterWindow.add(Ti.UI.createTableView( {rowHeight:38, top: 0, data: rows }));
var masterNav = Ti.UI.iOS.createNavigationWindow({window: masterWindow});
var splitWindow = Ti.UI.iPad.createSplitWindow({
    detailView: detailNav,
    masterView: masterNav,
    showMasterInPortrait: true
});
splitWindow.open();

masterWindow.addEventListener('click', function(e){
  var new_win = Ti.UI.createWindow({title: '新しい右側', backgroundColor:'#fff'});
  detailNav.openWindow(new_win);
});