"Searching Best of Kirupa.com" tutorial question

Hi!!

I have been looking at the “Searching Best of Kirupa.com” tutorial and I have a question that I hope someone can help me answer.

If you search for “happy” you get no results but if you search for “Happy” you get 1 result.
Is there a way to make the search ignore capital letters? So if you search for “happy” you get the same result as if you search for “Happy”.

Have a nice day!
/lillo