The source code

    Ext.onReady(function(){

        var handleAction = function(action){
            Ext.example.msg('Action', 'You clicked "'+action+'"');
        };

        var p = new Ext.Window({
            title: 'Standard',
            closable: false,
            height:250,
            width: 500,
            bodyStyle: 'padding:10px',
            contentEl: 'content',
            autoScroll: true,
            tbar: [{
                xtype:'splitbutton',
                text: 'Menu Button',
                iconCls: 'add16',
                handler: handleAction.createCallback('Menu Button'),
                menu: [{text: 'Menu Item 1', handler: handleAction.createCallback('Menu Item 1')}]
            },'-',{
                xtype:'splitbutton',
                text: 'Cut',
                iconCls: 'add16',
                handler: handleAction.createCallback('Cut'),
                menu: [{text: 'Cut menu', handler: handleAction.createCallback('Cut menu')}]
            },{
                text: 'Copy',
                iconCls: 'add16',
                handler: handleAction.createCallback('Copy')
            },{
                text: 'Paste',
                iconCls: 'add16',
                menu: [{text: 'Paste menu', handler: handleAction.createCallback('Paste menu')}]
            },'-',{
                text: 'Format',
                iconCls: 'add16',
                handler: handleAction.createCallback('Format')
            },'->',{
                text: 'Right',
                iconCls: 'add16',
                handler: handleAction.createCallback('Right')
            }]
        });
        p.show();

    });