Buy iTunes Gift Cards with PayPal Account
I want to buy an iTunes Gift Card online but instead of using a Credit Card I would like to use the credit that I have in my PayPal account. Is this possible to do? And please don't just give me a link but try explaining how to do it if it is possible.
Thanks in advance.
MacBook Pro 13" (Mid-2010 Edition), Mac OS X (10.6.6)