This is intended for coordinates maintaining a lot of course-sections. Repeatedly downloading attendance sheets for each individual section can be a bit painful. This script is here to automate that for you.
Log into USIS, then go to the Attendance tab and select either (before confirmation) or (after confirmation).
Select academic year, semster and course.
Then run this script.
Since this script is going to download a lot of attendance sheet files, chrome will likely block pop-ups.
Check the right end of the address bar, and there should be an icon indicating that.
Click on it and then select Allow all pop-ups from usis.bracu.ac.bd.