//checks all DataGrid CheckBoxes with the given name with the given

    function CheckAllDataGridCheckBoxes(aspCheckBoxID, checkVal) {

        re = new RegExp(aspCheckBoxID)  //generated control

        for(i = 0; i < document.forms[0].elements.length; i++) {

            elm = document.forms[0].elements[i]

            if (elm.type == 'checkbox') {

                if (re.test(elm.name)) {

                    elm.checked = checkVal

                }
            }
        }
    }