var nCondition = new GC.Spread.Sheets.ConditionalFormatting.Condition(GC.Spread.Sheets.ConditionalFormatting.ConditionType.averageCondition, {compareType: GC.Spread.Sheets.ConditionalFormatting.AverageConditionType.above});
nCondition.ranges([new GC.Spread.Sheets.Range(0, 0, 10, 3)]);
var validator = new GC.Spread.Sheets.DataValidation.DefaultDataValidator(nCondition);
validator.type(GC.Spread.Sheets.DataValidation.CriteriaType.custom);
activeSheet.getCell(0, 0, GC.Spread.Sheets.SheetArea.viewport).validator(validator);
spread.options.highlightInvalidData = true;
activeSheet.setValue(0, 0, 5);
activeSheet.setValue(1, 0, 15);