SSRS charts visibility as per the filter

Hi;

I have two chart to display on SSRS say Chart A and Chart B



I need to display  chart as per the selection of output in the filter

Chart A should be diplayed with output = Start on Scheme
Chart B should be diplayed with output = Pre Start Assist


If both the output are selected both charts should be displayed

Any help on this much apprecited

Thanks

Pradnya07