function resetToDefaultIfNotValid(dxTargetObj, aspValidatorObj, defaultValue) {
    if (dxTargetObj == null || aspValidatorObj == null) return;
    if (event == null) return;
    if (event.propertyName.toLowerCase() != "isvalid") return;
    if (typeof (Page_Validators) == 'undefined') return;
    if (!aspValidatorObj.isvalid) {
        dxTargetObj.SetValue(defaultValue);
    }
}