function __AjaxValidationCallback(arg, context) {
    var val = context[0];
    var value = context[1];
    var historyId = context[2];

    val.isvalid = arg == 'True';

    document.getElementById(historyId).value = value + ';' + arg;

    if (!val.isvalid) {
        Page_IsValid = false;
        Page_BlockSubmit = true;
    }

    ValidatorUpdateDisplay(val);

    if (ValidatorUpdateIsValid)
        ValidatorUpdateIsValid();
    
    ValidationSummaryOnSubmit(null);
}