I know there are some articles in MDC (https://developer.mozilla.org/
en/How_to_implement_custom_autocomplete_search_compon ent) but i still
cannot understand how to use customize auto compelete textbox.

I set the attribute and copy the code at the end of the page and save
it to componse folder. but it looks like it could not work.

can anyone help me about this? or give me a simple sample so i can
learn that quick.