Simple numeric editor.. while turning readOnly to true, how to make it visually disabled.. thanks

<input id="auEnd" style="font-size: 16px; font-weight: bold " /> <label class="auSpan">

$("#auEnd").igNumericEditor({
dataMode: "int"
, groupSeparator: ''
, value: null
, minValue: 2000
, maxValue: new Date().getFullYear() + 10
, button: "spin"
, width: 90
, height: 30
, valueChanged: function (evt, ui) {
auditVM.OneAuditData.AuditPeriodEnds(ui.value);
}
});