I need a script which allows fading efect for one text when we select another text or radio button.

For example:-- I select a radio button for selection of number of books for the question
how many books you need
1. 5 books
2. 10 books
3. 6 books

How many books you want to take home
1. 2
2.5
3. 6

and I select the radio button correponding to answer number 2. 10 books
, automatically the answer number 2 for the second question should get faded.

is this possible through javascript?

thanks in advance
Meera