Reg pwiki front controller

Hi,
We are displaying a chart in pwiki page. On click of chart we are bringing an overlay panel. Wanted to know if the piwik front controller would be invoked in case of overlay panel load event?
If ajax calls are being used on piwik application, how do we ensure that the control gets transferred to Piwik front controller

-Thanks

If you want to funnel requests through Piwik’s FrontController, it has to first go through index.php.