reportCommentsGrid = function(){

   var colSelect = new Ext.grid.SelectColumn();
    var columns = [
        colSelect,
        {header: "Comment",sortable: true, dataIndex: 'comment'},
        {header: "Type", sortable: true, dataIndex: 'type', width: 100},
        {header: "Favorite", sortable: true, dataIndex: 'favorite', width: 100}      
    ];

    reportCommentsGrid.superclass.constructor.call(this, {
        store: new Ext.data.Store({
            url : 'teacher_tools/reportcomments_data.json.php',
            baseParams: {command: 'getComments'},
            reader: new Ext.data.JsonReader({root: 'getComments'}, [            
              {name: 'select'},
              {name: 'comment'},
              {name: 'type'},
              {name: 'favorite'}         
            ]),
              autoLoad : false
        }),
        title: 'Comments',
        columns: columns,
        plugins:[colSelect],
        border: true,
        layout: 'fit',
        autoScroll: true
    });
}

Ext.extend(reportCommentsGrid, Ext.grid.EditorGridPanel);