Onclick Change The Value Of Text Box - Scriptaculous

I use scriptaculous to retrieve the hotel names and area names from database in this page. My question is where it says step 3, Search for hotel, chain or location!. Type in syd for example and you see how it retrieves the values from database and shows them underneath. It works fine and the list is generated beautifully. Now I have to add the next step which is filling this text box (from step 3 where you typed syd in) with the value (of the item clicked on). For example once you typed sydney, if you click on Sydney, I want the text field to be filled with value sydney.