Radio button issue

Hi,

  i have created 2 radio buttons as p_code,p_pono and select-options as s_ccode ,s_pono.

when i am selecting p_pono , s_pono should be deactivated,but in my code s_pono is in activate state and i am able to enter the values.

can any one please give me solution. i am attaching the code.

Thanks

Deepthi.