I want to create an on page calculation, but I havenít been able to find a suitable script, or tutorial to help me. Can anyone point me to a source that will help.

I have a form and I need to auto calculate the results on page.

No of items
Price of items
Discount per item
%age Tax
Total

If I insert data into the first four then the total should autocalculate

Can anyone help me here

Thanks