The source code

    Ext.onReady(function(){

        Ext.QuickTips.init();

        var xg = Ext.grid;

        // shared reader
        var reader = new Ext.data.ArrayReader({}, [
           {name: 'company'},
           {name: 'price', type: 'float'},
           {name: 'change', type: 'float'},
           {name: 'pctChange', type: 'float'},
           {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'},
           {name: 'industry'},
           {name: 'desc'}
        ]);

        ////////////////////////////////////////////////////////////////////////////////////////
        // Grid 1
        ////////////////////////////////////////////////////////////////////////////////////////
        // row expander
        var expander = new Ext.ux.grid.RowExpander({
            tpl : new Ext.Template(
                'Company: {company}
    ',
                'Summary: {desc}'
            )
        });

        var grid1 = new xg.GridPanel({
            store: new Ext.data.Store({
                reader: reader,
                data: xg.dummyData
            }),
            cm: new xg.ColumnModel({
                defaults: {
                    width: 20,
                    sortable: true
                },
                columns: [
                    expander,
                    {id:'company',header: "Company", width: 40, dataIndex: 'company'},
                    {header: "Price", renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
                    {header: "Change", dataIndex: 'change'},
                    {header: "% Change", dataIndex: 'pctChange'},
                    {header: "Last Updated", renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
                ]
            }),
            viewConfig: {
                forceFit:true
            },
            columnLines: true,
            width: 600,
            height: 300,
            plugins: expander,
            collapsible: true,
            animCollapse: false,
            title: 'Expander Rows, Collapse and Force Fit',
            iconCls: 'icon-grid',
            renderTo: document.body
        });

        ////////////////////////////////////////////////////////////////////////////////////////
        // Grid 2
        ////////////////////////////////////////////////////////////////////////////////////////
        var sm = new xg.CheckboxSelectionModel();
        var grid2 = new xg.GridPanel({
            store: new Ext.data.Store({
                reader: reader,
                data: xg.dummyData
            }),
            cm: new xg.ColumnModel({
                defaults: {
                    width: 120,
                    sortable: true
                },
                columns: [
                    sm,
                    {id:'company',header: "Company", width: 200, dataIndex: 'company'},
                    {header: "Price", renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
                    {header: "Change", dataIndex: 'change'},
                    {header: "% Change", dataIndex: 'pctChange'},
                    {header: "Last Updated", width: 135, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
                ]
            }),
            sm: sm,
            columnLines: true,
            width:600,
            height:300,
            frame:true,
            title:'Framed with Checkbox Selection and Horizontal Scrolling',
            iconCls:'icon-grid',
            renderTo: document.body
        });

        ////////////////////////////////////////////////////////////////////////////////////////
        // Grid 3
        ////////////////////////////////////////////////////////////////////////////////////////
        var grid3 = new xg.GridPanel({
            store: new Ext.data.Store({
                reader: reader,
                data: xg.dummyData
            }),
            cm: new xg.ColumnModel([
                new xg.RowNumberer(),
                {id:'company',header: "Company", width: 40, sortable: true, dataIndex: 'company'},
                {header: "Price", width: 20, sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
                {header: "Change", width: 20, sortable: true, dataIndex: 'change'},
                {header: "% Change", width: 20, sortable: true, dataIndex: 'pctChange'},
                {header: "Last Updated", width: 20, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
            ]),
            viewConfig: {
                forceFit:true
            },
            columnLines: true,
            width:600,
            height:300,
            title:'Grid with Numbered Rows and Force Fit',
            iconCls:'icon-grid',
            renderTo: document.body
        });

        ////////////////////////////////////////////////////////////////////////////////////////
        // Grid 4
        ////////////////////////////////////////////////////////////////////////////////////////
        var sm2 = new xg.CheckboxSelectionModel({
            listeners: {
                // On selection change, set enabled state of the removeButton
                // which was placed into the GridPanel using the ref config
                selectionchange: function(sm) {
                    if (sm.getCount()) {
                        grid4.removeButton.enable();
                    } else {
                        grid4.removeButton.disable();
                    }
                }
            }
        });
        var grid4 = new xg.GridPanel({
            id:'button-grid',
            store: new Ext.data.Store({
                reader: reader,
                data: xg.dummyData
            }),
            cm: new xg.ColumnModel([
                sm2,
                {id:'company',header: "Company", width: 40, sortable: true, dataIndex: 'company'},
                {header: "Price", width: 20, sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
                {header: "Change", width: 20, sortable: true, dataIndex: 'change'},
                {header: "% Change", width: 20, sortable: true, dataIndex: 'pctChange'},
                {header: "Last Updated", width: 20, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
            ]),
            sm: sm2,

            viewConfig: {
                forceFit:true
            },
            columnLines: true,

            // inline buttons
            buttons: [{text:'Save'},{text:'Cancel'}],
            buttonAlign:'center',

            // inline toolbars
            tbar:[{
                text:'Add Something',
                tooltip:'Add a new row',
                iconCls:'add'
            }, '-', {
                text:'Options',
                tooltip:'Blah blah blah blaht',
                iconCls:'option'
            },'-',{
                text:'Remove Something',
                tooltip:'Remove the selected item',
                iconCls:'remove',

                // Place a reference in the GridPanel
                ref: '../removeButton',
                disabled: true
            }],

            width:600,
            height:300,
            frame:true,
            title:'Support for standard Panel features such as framing, buttons and toolbars',
            iconCls:'icon-grid',
            renderTo: document.body
        });
    });

    // Array data for the grids
    Ext.grid.dummyData = [
        ['3m Co',71.72,0.02,0.03,'9/1 12:00am', 'Manufacturing'],
        ['Alcoa Inc',29.01,0.42,1.47,'9/1 12:00am', 'Manufacturing'],
        ['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am', 'Manufacturing'],
        ['American Express Company',52.55,0.01,0.02,'9/1 12:00am', 'Finance'],
        ['American International Group, Inc.',64.13,0.31,0.49,'9/1 12:00am', 'Services'],
        ['AT&T Inc.',31.61,-0.48,-1.54,'9/1 12:00am', 'Services'],
        ['Boeing Co.',75.43,0.53,0.71,'9/1 12:00am', 'Manufacturing'],
        ['Caterpillar Inc.',67.27,0.92,1.39,'9/1 12:00am', 'Services'],
        ['Citigroup, Inc.',49.37,0.02,0.04,'9/1 12:00am', 'Finance'],
        ['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'9/1 12:00am', 'Manufacturing'],
        ['Exxon Mobil Corp',68.1,-0.43,-0.64,'9/1 12:00am', 'Manufacturing'],
        ['General Electric Company',34.14,-0.08,-0.23,'9/1 12:00am', 'Manufacturing'],
        ['General Motors Corporation',30.27,1.09,3.74,'9/1 12:00am', 'Automotive'],
        ['Hewlett-Packard Co.',36.53,-0.03,-0.08,'9/1 12:00am', 'Computer'],
        ['Honeywell Intl Inc',38.77,0.05,0.13,'9/1 12:00am', 'Manufacturing'],
        ['Intel Corporation',19.88,0.31,1.58,'9/1 12:00am', 'Computer'],
        ['International Business Machines',81.41,0.44,0.54,'9/1 12:00am', 'Computer'],
        ['Johnson & Johnson',64.72,0.06,0.09,'9/1 12:00am', 'Medical'],
        ['JP Morgan & Chase & Co',45.73,0.07,0.15,'9/1 12:00am', 'Finance'],
        ['McDonald\'s Corporation',36.76,0.86,2.40,'9/1 12:00am', 'Food'],
        ['Merck & Co., Inc.',40.96,0.41,1.01,'9/1 12:00am', 'Medical'],
        ['Microsoft Corporation',25.84,0.14,0.54,'9/1 12:00am', 'Computer'],
        ['Pfizer Inc',27.96,0.4,1.45,'9/1 12:00am', 'Services', 'Medical'],
        ['The Coca-Cola Company',45.07,0.26,0.58,'9/1 12:00am', 'Food'],
        ['The Home Depot, Inc.',34.64,0.35,1.02,'9/1 12:00am', 'Retail'],
        ['The Procter & Gamble Company',61.91,0.01,0.02,'9/1 12:00am', 'Manufacturing'],
        ['United Technologies Corporation',63.26,0.55,0.88,'9/1 12:00am', 'Computer'],
        ['Verizon Communications',35.57,0.39,1.11,'9/1 12:00am', 'Services'],
        ['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'9/1 12:00am', 'Retail'],
        ['Walt Disney Company (The) (Holding Company)',29.89,0.24,0.81,'9/1 12:00am', 'Services']
    ];

    // add in some dummy descriptions
    for(var i = 0; i < Ext.grid.dummyData.length; i++){
        Ext.grid.dummyData[i].push('Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Sed metus nibh, sodales a, porta at, vulputate eget, dui. Pellentesque ut nisl. Maecenas tortor turpis, interdum non, sodales non, iaculis ac, lacus. Vestibulum auctor, tortor quis iaculis malesuada, libero lectus bibendum purus, sit amet tincidunt quam turpis vel lacus. In pellentesque nisl non sem. Suspendisse nunc sem, pretium eget, cursus a, fringilla vel, urna.

    Aliquam commodo ullamcorper erat. Nullam vel justo in neque porttitor laoreet. Aenean lacus dui, consequat eu, adipiscing eget, nonummy non, nisi. Morbi nunc est, dignissim non, ornare sed, luctus eu, massa. Vivamus eget quam. Vivamus tincidunt diam nec urna. Curabitur velit.');
    }