Sorry, this web browser is quite a long way out of date, and will not allow the assignment calculator to run.
To use the calculator, try a new version of Firefox or Google Chrome, or if you really have to use Internet Explorer then versions 10 and upwards should work fine.
If this is an institutional machine that you cannot update yourself, check for another browser, and please let the institution know it needs updating.
If you would like to see how the calculator works, here is a screencast demonstrating it's use.