Hi ,
Refer to my previous post "Arrow keys Scrolling on Div" , I created a text search with html_ajax.
When you type text , it would display the search result in dropdown box under the textbox like in google suggest. When you click on a drop-down text , it will be placed into the text field and Dropdown (Div tag) disappers using a function hide('div tag id') .

I used only html , javascript and html_ajax....