how to show the values in the chart

[#1]

Hi all

I have the three listboxes one is companyname

and secor and third one is the subsector

there is no relation between these list boxes

if i select the company like infosys and wipro it should as two lines in the line chart

at the same time if i select the sector,it should show the one more line in the line chart

also if i select the sub sector ,it also should show one more line in the line chart.

could anyone help me, how to do this one....

thanks in advance