how to get values of cells p:datatable in javascript

how to get values of cells p:datatable in javascript

i have one p:datatable (primefaces data table) with 4 rows 13 columns,
roweditable using ajax. where i rendered 4 rows (records) in 12 columns
each column has radiobox on the top if i select any column i want to get
values of that col in javascript and then do something with values then
set those values to column number 13 which does not have radio box when i
saw source code from browser i see id e.g somethingId:0:j_xxx,
somethingId:1:j_xxx so on.. i can not understand this.. please HELP!!
sorry for my bad english!! thanks.