In DNN getElementById cant find control

[Declan]

I am using RadGrid in a DotNetNuke module and am trying to access a check box within an edit form template on the grid on the client, without success.

If I put a check box outside the grid I can access it without difficulty.

Normally I would access controls on a form on the client side using something like:

var gridControl = document.getElementById("<%= grd.ClientID %>");
alert(gridControl.id);

This works for the grid and if I use something similar with a check box outside the grid it also works.

var cb= document.getElementById("<%= myCheckBox.ClientID %>");
alert(cb.id);

How can I access the check box within the edit form of a rad grid? The checkbox does not exist in the Item template only the edit item template.

A sample would be appreciated.

Declan

[Declan]

This works but not very elegant!

function TestCheckBox()
    {
    var gridControl = document.getElementById("<%= grd.ClientID %>");
    var Inputs = gridControl.getElementsByTagName("input");

    for (var n = 0; n < Inputs.length; ++n)
        if (Inputs[n].type == 'checkbox')
            {
                if (Inputs[n].id.indexOf('chkBox') > 0 && Inputs[n].checked)
                    {
                        var message = "Some message text.\n" +
                        "Click OK to continue or Cancel to change your selection.\n"
                        if (!confirm(message)) return false;
                            return true;
                    }
            }
    }