Populate second parameter dropdown list on change of first parameter of textbox.

I am using SSRS2008. I am creating rdl file by using 3 parameters. First parameter is giving through text box and rest two are from two dropdownlist in rdl file. I need to populate second parameter on change of first parameter. I.e when i change in textbox then second parameter dropdown list should be populated on the basis of new value of textbox.

Please suggest me how to achieve this. Can we have any text change event of textbox in rdl or how to do the same?

Thanks & Regards,

Wilfy_123