adding a check box to update approval list in tsTimeSheetLine

hi all,

I want to add check box in ep home page(work list) , i need to add the check box before every TimeSheetLine and

when i click check box it needs to call Tables\TSTimesheetLine\Methods\updateApproverList method.

as i am new to ep, please provide me the steps what i need to do to add check list to ep, and how to write code

for calling updateApproverList method when we click through ep.