Checkbox checked event in repeator

Question

i have a book shop website
where in i am displaying the book details with a repeater
inside the repeater i have item tempelates for displaying the book data
along with the book data i have a check box
here is my requirement
when the user clicks this checkbox associated with a book the respective book details should get inserted in a
table in sql server, how can i capture the checkbox checked event inside a reator.
all help appreciated..
thanks in advance
i am attatching my screen shot also