to add search boxes in the links sections.

Cj would be having something called as "Add Links" where the merchant adds banner links, text links, product links.

I have also noticed that there are a few search boxes in ebay with different styles(radio buttons, check boxes) the bakground images along with it etc.

How does a merchant add these search boxes into the cj - add links section ?

Can anyone clear me with this theory. AS to what exactly does the merchant need to do ?