Charting

Hi I am developing an application that requires to create a chart. I have used the example from Geocortex HTML5 SDK Sample Charting Basics. I have made most of it working for my project, however there is thing that i have no solution. The label on the X-Axis can only display all (if set showLabels to true) or None (if set showLabels to false). I want display part of it  (say evry 5 or 10 ) because there are more than 100 sets of data, if show all of them none of them can be read. I have read some docs and go through some Charting related models it seems to me it need to set axisLabelMode:to "Smart" (and I guess it is currently set to "All"), but that property (axisLabelMode:) is not public and can not be set. Can someone help me? My settings Geocortex Essential version 4.2 THML5 Viewer version 2.4.1. "