I created a sample.js under /js/test/grid/grid_definitions/sample.js and my dojo root directory is at /js/dojo/dojo/dojo.js

dojo.provide("test.grid.grid_definitions.sample");

(function(){
    test.grid.grid_definitions.sample.structure = [{
        cells: [[{
            name: 'Dow',
            width:"auto",
            rowSpan: 2,
            field: "dow"
        }, {
            name: 'Stay Date',
            width:"auto",
            rowSpan: 2,
            field: "staydate"
        }, {
            name: 'T1 (1-6)',
            width:"auto"
        }, {
            name: 'T2 (7-13)',
            width:"auto",
            colSpan: 2
        }, {
            name: 'T3 (14-20)',
            width:"auto",
            colSpan: 2
        }, {
            name: 'T4 (21-27)',
            width:'auto'
        }, {
            name: 'T5 (28-34)',
            width:"auto",
        }, {
            name: 'T6 (35-KDATE)',
            width:"auto",
            colSpan: 2
        }], [{
            name: 'Current',
            width:"auto",
            field: "t1_current"
        }, {
            name: 'Cal/Over',
            width:"auto",
            field: "t2_cal"
        }, {
            name: 'INC or %',
            width:"auto",
            field: "t2_inc"
        }, {
            name: 'Cal/Over',
            width:"auto",
            field: "t3_cal"
        }, {
            name: 'INC or %',
            width:"auto",
            field: "t3_inc"
        }, {
            name: 'Cal/Over',
            width:"auto",
            field: "t4_cal"
        }, {
            name: 'Cal/Over',
            width:"auto",
            field: "t5_cal"
        }, {
            name: 'Cal/Over',
            width:"auto",
            field: "t6_cal"
        }, {
            name: 'INC or %',
            width:"auto",
            field: "t6_inc"
        }, ]]
    }];
})();

And my sample json data at the root /sample.json

{  identifier: "id",
   label: "id",
   items: 
   [   
        {   id:1,
            dow:"Sun",
            staydate:"1-Jun-08",
            t1_current:"169.00",
            t2_cal:"152.00",
            t2_inc:"(10%)",
            t3_cal:"152.00",
            t3_inc:"(10%)",
            t4_cal:"152.00",
            t5_cal:"152.00",
            t6_cal:"152.00",
            t6_inc:"" 
         }
    ]
}

also in my html i add the following

<script type="text/javascript">
            dojo.registerModulePath("test","../../test");
            dojo.require("dijit.form.FilteringSelect");
            dojo.require("dojox.grid.Grid");
            dojo.require("dojo.data.ItemFileReadStore");
            dojo.require("test.grid.grid_definitions.sample");
            dojo.require("dojo.parser");
</script>

and my grid as follows

<div id="data">
   <span dojoType="dojo.data.ItemFileReadStore" jsId="sampleStore" url="/sample.json"></span>
   <div id="data_grid" dojoType="dojox.grid.Grid" jsId="sampleGrid" store="sampleStore"
          structure="test.grid.grid_definitions.sample.structure"></div>
                    
    <div dojoType="dijit.form.FilteringSelect" store="sampleStore" labelAttr="id"
            searchAttr="id" name="id"/></div>
</div>

Initially I thought my store is messed-up, but I added Select box to check if its working and it works. So the dataStore is good. I have two problems right now.

On FireFox (2.0) - the grid shows up with the header (and no data in it)
On IE (6.0) - I don't see a grid and getting following error
    failed loading lib/dojo/../test/grid/grid_definitions/sample.js with error: [object Error]

I am read the documentation and following examples - http://api.dojotoolkit.org/jsdoc/dojo/HEAD/dojo.registerModulePath and trying post issues, but no response.

I am stuck. I have to evaluate dojo grids for our new project. Please help!!!