“RangeError: Maximum call stack size exceeded”

function ToggleVProcure(chkValidProc) {
    $.ajax({ type: "POST", url: "DocumentManager.aspx", data: { Action: "ValidateProcure", Id: chkValidProc.attributes["DId"].value }, dataType: "json",
        success: function (data, textStatus) {
            if (textStatus == "success") {

                var chkProc = $('[did="' + chkValidProc.attributes["Did"].value + '"]');
                var checkCPD = $('[docid="' + chkValidProc.attributes["Did"].value + '"]');
                var span = $('#span' + chkValidProc.attributes["Did"].value);
                var supplierId = $("#chkValidProc").attr("SId");

                if (checkCPD.attr('checked') && chkProc.attr('checked')) {

                    span.attr("style", "color: Green;");

                    var s = $('input[SId="' + supplierId + '"]:checked').length;

                    var totalperc = (s / 13 * 100).toFixed(1);
                    $(chkValidProc.parentNode.parentNode.parentNode.parentNode).find('#lblTotalScore').text(Math.floor(totalperc.toString()));

                }
                else {

                    span.attr("style", "color: Red;");
                    var s = $('input[SId="' + supplierId + '"]:checked').length;

                    var totalperc = (s / 13 * 100).toFixed(1);
                    $(chkValidProc.parentNode.parentNode.parentNode.parentNode).find('#lblTotalScore').text(Math.floor(totalperc.toString()));

                }

                MyAlert("Success", "This Document's Procurement Validation Status Has been Updated.", "NOTE");
            }
        },
        error: function (data, textStatus, errorThrown) {
            alert("An unexpected error occurred: " + errorThrown);
        }
    });
}