The source code

    /*
     * ================  TabPanel with nested layouts  =======================
     */
    // fake grid data used below in the tabsNestedLayouts config
    var myData = [
        ['3m Co',71.72,0.02,0.03,'9/1 12:00am'],
        ['Alcoa Inc',29.01,0.42,1.47,'9/1 12:00am'],
        ['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am'],
        ['American Express Company',52.55,0.01,0.02,'9/1 12:00am'],
        ['American International Group, Inc.',64.13,0.31,0.49,'9/1 12:00am'],
        ['AT&T Inc.',31.61,-0.48,-1.54,'9/1 12:00am'],
        ['Boeing Co.',75.43,0.53,0.71,'9/1 12:00am'],
        ['Caterpillar Inc.',67.27,0.92,1.39,'9/1 12:00am'],
        ['Citigroup, Inc.',49.37,0.02,0.04,'9/1 12:00am'],
        ['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'9/1 12:00am'],
        ['Exxon Mobil Corp',68.1,-0.43,-0.64,'9/1 12:00am'],
        ['General Electric Company',34.14,-0.08,-0.23,'9/1 12:00am'],
        ['General Motors Corporation',30.27,1.09,3.74,'9/1 12:00am'],
        ['Hewlett-Packard Co.',36.53,-0.03,-0.08,'9/1 12:00am'],
        ['Honeywell Intl Inc',38.77,0.05,0.13,'9/1 12:00am'],
        ['Intel Corporation',19.88,0.31,1.58,'9/1 12:00am'],
        ['International Business Machines',81.41,0.44,0.54,'9/1 12:00am'],
        ['Johnson & Johnson',64.72,0.06,0.09,'9/1 12:00am'],
        ['JP Morgan & Chase & Co',45.73,0.07,0.15,'9/1 12:00am'],
        ['McDonald\'s Corporation',36.76,0.86,2.40,'9/1 12:00am'],
        ['Merck & Co., Inc.',40.96,0.41,1.01,'9/1 12:00am'],
        ['Microsoft Corporation',25.84,0.14,0.54,'9/1 12:00am'],
        ['Pfizer Inc',27.96,0.4,1.45,'9/1 12:00am'],
        ['The Coca-Cola Company',45.07,0.26,0.58,'9/1 12:00am'],
        ['The Home Depot, Inc.',34.64,0.35,1.02,'9/1 12:00am'],
        ['The Procter & Gamble Company',61.91,0.01,0.02,'9/1 12:00am'],
        ['United Technologies Corporation',63.26,0.55,0.88,'9/1 12:00am'],
        ['Verizon Communications',35.57,0.39,1.11,'9/1 12:00am'],
        ['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'9/1 12:00am']
    ];

    var tabsNestedLayouts = {
    	xtype: 'tabpanel',
    	id: 'tabs-nested-layouts-panel',
    	title: 'TabPanel with Nested Layouts',
    	activeTab: 0,
    	items:[{
    		title: 'Foo',
    		layout: 'border',
    		items: [{
    			region: 'north',
    			title: 'North',
    			height: 75,
    			maxSize: 150,
    			margins: '5 5 0 5',
    			bodyStyle: 'padding:10px;',
    			split: true,
    			html: 'Some content'
    		},{
    			xtype: 'tabpanel',
    			plain: true,
    			region: 'center',
    			margins: '0 5 5 5',
    			activeTab: 0,
    			items: [{
    				title: 'Inner Tab 1',
    				bodyStyle: 'padding:10px;',
    				html: 'See Inner Tab 2 for another nested BorderLayout.'
    			},{
    				title: 'Inner Tab 2',
    				cls: 'inner-tab-custom', // custom styles in layout-browser.css
    				layout: 'border',
                    // Make sure IE can still calculate dimensions after a resize when the tab is not active.
                    // With display mode, if the tab is rendered but hidden, IE will mess up the layout on show:
                    hideMode: Ext.isIE ? 'offsets' : 'display',
    				items: [{
    					title: 'West',
    					region: 'west',
    					collapsible: true,
    					width: 150,
    					minSize: 100,
    					maxSize: 350,
    					margins: '5 0 5 5',
    					cmargins: '5 5 5 5',
    					html: 'Hello',
    					bodyStyle:'padding:10px;',
    					split: true
    				},{
    					xtype: 'tabpanel',
    					region: 'center',
    					margins: '5 5 5 0',
    					tabPosition: 'bottom',
    					activeTab: 0,
    					items: [{
    						// Panels that are used as tabs do not have title bars since the tab
    						// itself is the title container.  If you want to have a full title
    						// bar within a tab, you can easily nest another panel within the tab
    						// with layout:'fit' to acheive that:
    						title: 'Bottom Tab',
    						layout: 'fit',
    						items: {
    							title: 'Interior Content',
    							bodyStyle:'padding:10px;',
    							border: false,
    							html: 'See the next tab for a nested grid. The grid is not rendered until its tab is first accessed.'
    						}
    					},{
    						// A common mistake when adding grids to a layout is creating a panel first,
    						// then adding the grid to it.  GridPanel (xtype:'grid') is a Panel subclass,
    						// so you can add it directly as an item into a container.  Typically you will
    						// want to specify layout:'fit' on GridPanels so that they'll size along with
    						// their container and take up the available space.
    						title: 'Nested Grid',
    						xtype: 'grid',
    						layout: 'fit',
    				        store: new Ext.data.ArrayStore({
    					        fields: [
    					           {name: 'company'},
    					           {name: 'price', type: 'float'},
    					           {name: 'change', type: 'float'},
    					           {name: 'pctChange', type: 'float'},
    					           {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
    					        ]
    					    }),
    				        columns: [
    				            {id:'company',header: 'Company', width: 160, sortable: true, dataIndex: 'company'},
    				            {header: 'Price', width: 75, sortable: true, renderer: 'usMoney', dataIndex: 'price'},
    				            {header: 'Change', width: 75, sortable: true, dataIndex: 'change'},
    				            {header: '% Change', width: 75, sortable: true, dataIndex: 'pctChange'},
    				            {header: 'Last Updated', width: 85, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
    				        ],
    				        stripeRows: true,
    				        autoExpandColumn: 'company',

    				        // Add a listener to load the data only after the grid is rendered:
    				        listeners: {
    				        	render: function(){
    				        		this.store.loadData(myData);
    				        	}
    				        }
    					}]
    				}]
    			}]
    		}]
    	},{
    		title: 'Bar',
    		bodyStyle: 'padding:10px;',
    		html: 'Nothing to see here.'
    	}]
    };

    /*
     * ================  Absolute Layout Form  =======================
     */
    var absform = new Ext.form.FormPanel({
        baseCls: 'x-plain',
        layout:'absolute',
        url:'save-form.php',
        border: true,
        defaultType: 'textfield',

        items: [{
            x: 0,
            y: 5,
            xtype: 'label',
            text: 'From:'
        },{
            x: 55,
            y: 0,
            name: 'from',
            anchor:'100%'  // anchor width by %
        },{
            x: 0,
            y: 32,
            xtype: 'label',
            text: 'To:'
        },{
        	// The button is not a Field subclass, so it must be
        	// wrapped in a panel for proper positioning to work
        	xtype: 'panel',
        	x: 55,
        	y: 27,
        	items: {
    	    	xtype: 'button',
    	    	text: 'Contacts...'
        	}
        },{
            x: 135,
            y: 27,
            name: 'to',
            anchor: '100%'  // anchor width by %
        },{
            x: 0,
            y: 59,
            xtype: 'label',
            text: 'Subject:'
        },{
            x: 55,
            y: 54,
            name: 'subject',
            anchor: '100%'  // anchor width by %
        },{
            x:0,
            y: 81,
            xtype: 'textarea',
            name: 'msg',
            anchor: '100% 100%'  // anchor width and height
        }]
    });

    var absoluteForm = {
        title: 'Absolute Layout Form',
        id: 'abs-form-panel',
        layout: 'fit',
        bodyStyle: 'padding:15px;',
        items: {
        	title: 'New Email',
        	cls: 'email-form',
    	    layout: 'fit',
    	    frame: true,
    	    bodyStyle: 'padding:10px 5px 5px;',
    	    items: absform,

    	    tbar: [{
    	    	text: 'Send',
    	    	iconCls: 'icon-send'
    	    },'-',{
    	    	text: 'Save',
    	    	iconCls: 'icon-save'
    	    },{
    	    	text: 'Check Spelling',
    	    	iconCls: 'icon-spell'
    	    },'-',{
    	    	text: 'Print',
    	    	iconCls: 'icon-print'
    	    },'->',{
    	    	text: 'Attach a File',
    	    	iconCls: 'icon-attach'
    	    }]
        }
    };