search value for other than datatable columns

Hi friends.i have a doubt.plz clarify me.iam using a datatable to display information from database.

for every column search,it is going to server and getting the values.i can i retrieve column values in the serverside using sSearch_0,sSearch_1 etc.these values are automatically going.

i want to add a checkbox .when i click on this checkbox the records should display according to this selected checkbox.for ex,clicked checkbox value is N.the records of status N should be displayed.This checkbox is not related to datatable.how can i take this value to the database and syncronize with datatables columns.how should i send this checkbox value along with sSearch_0,sSearch_1.

Help me if anybody know.