A tip on making autocompletes smarter

I was looking at several auto complete solutions out there (mootools, yahoo ui, scriptaculous)

and they all didn’t work as i wanted if my search omited words…

ie… say im searching for a camera… the full model name is “Canon PowerShot SD800 IS Digital Elph”

but i can only remember its a canon , and its the model sd800

but using those autocomplete solutions, if i put in “canon sd800” it turns up nothing.
Its only when I put in “canon powershot sd…” that it began to suggest stuff…
It didnt work if i omited parts of the search query…

i wrote out how i fixed it here
http://www.susanbuck.net/sb/words/index.asp?permanent=yes&permKey=163