Start Building Professional
Web Apps Today

getValue error: childIndexes is null or not an object

I am running into an error that I thought wasn't happening before.

The grid is setup as:
grdItems = new dhtmlXGridObject('grdItems_Container');
grdItems.setImagePath("../../images/grid_images/");
grdItems.imgURL = "../images/grid_images/";
grdItems.setHeader(",,");
grdItems.setNoHeader(true);
grdItems.enableColSpan(true);
grdItems.setInitWidths("200,150,20");
grdItems.setColAlign("left,right,right");
grdItems.setColTypes("ro,ro,ro");
grdItems.enableEditEvents(true);
grdItems.attachEvent("onCheckbox",addCost);
grdItems.init();

When I check off one of the checkboxes "addCosts" runs (as it should) and here is that code:
(The error is happening before the second alert)
function addCost(iRow,iCell,bState){
var iID=0;
var iRowCount = grdItems.getRowsNum();
    
for(var r=0; r<iRowCount; r++){
    iID = grdItems.getRowId(r);
    if (iID = iRow){
        iRow = (r+1);
        break;
    }
}

alert('1')
    //var sCost=grdItems.cells(iRow,1).getValue().toString();
    //var sCost=grdItems.cells(1,1).getValue() //.toString();
    //var sCost=grdItems.cells(0,0).getText() //.toString(); //childindexes
    //var sCost=grdItems.cells(1,0).getText()
    var sCost=grdItems.cells(0,1).getText()
alert('2 cost:'+sCost)
    sCost = sCost.replace("add $","");
    if (bState){
        mmItemPrice = (parseFloat(mmItemPrice) + parseFloat(sCost));
        calcQty();
    }
    else{
        mmItemPrice = (parseFloat(mmItemPrice) - parseFloat(sCost));
        calcQty();
    }

}


I attempted several different methods, but they all return the same "childIndexes is null or not an object" from the dhtmlgrid.js file, line 5685

Any thoughts?

Thanks for your time.
James

>>var sCost=grdItems.cells(0,1).getText() 

This is mean "second cell in the row with ID = 0" - is it correct?
If you need a first row, it will be 
         var sCost=grdItems.cells2(0,1).getText() 
If you need the same row , where checkbox was checked 
         var sCost=grdItems.cells(iRow,1).getText() 

>>"childIndexes is null or not an object"
This error occurs when non-existing ID or Index was used in API command.