I would like to using jQuery to implement cascading checkbox for client code as following:

I have two checkbox named Pass and Fail and a list of checkboxlist for grade scale (100, 90, 80, 70, 60, 50). If the user checks mark the Pass checkbox then automatically set 100, 90, 80 CheckBoxList  are selected; otherwise if check mark on Fail will also check marks on 70, 60 and 50. Please help me with my first post on your forum. Thanks in advance.