my dojo grid is not accepting spaces in the input text

Question

I have used dojo grid to display my table.I have a requirement that when I click on add a new row should be added .I am able to achieve it but the problem is in the newly added row am not able to move focus from one field to other not able to enter space in the text field. Tab press is not going to next text field. can some one help me on this..

this is my dojo grid:

var gridLayout = createLayout(columnHeadings,columnAttributes,columnWidths);
var gridStyling = "height:"+height+";width:"+width+";";

grid = new DataGrid(
    {
        id                  : 'grid'+gridId,
        store               : objectStore,
        structure           : gridLayout,
        escapeHTMLInData    : false,
        rowSelector         : '0px',
        canSort             : false,
        style               : gridStyling,
        noDataMessage       : noDataMessage,
        autoHeight          : false,
        singleClickEdit     : singleClickEdit
    },
    document.createElement('div')
);

adding row like below :

function addNewRow(index){

    var newItem = {};

    newItem['selectHTML']   = "<input id='"+index+"' name='newRow' value = 'true' type='radio'>";
    newItem['operatorId']   = "<input type='text' maxlength=4 style='width:100px' id='operatorId"+index+"'>";
    newItem['operatorName'] = "<input type='text' maxlength=50 style='width:100px' id='operatorName"+index+"'>";
    newItem['operatorType'] = getCombo( _this.context.options.operatorType.get("value"),"operatorType"+index , "" );


    _this.context.binding.get("value").add(newItem);
}