I am making a google suggest type search - which textbox event do I use?

[idn]

Hi, I am making a search similar to the google suggest type search, where ii shows results as you type in the text box in a div below it.

Everything is fine, except at the moment I am using the 'onkeyup' event, so its pretty slow as it search each time a character is pressed. I only search when valid characters are pressed, but still its pretty slow.

I was wondering what is the best way to do this

I dont want to have a search button, because that would be no way as good. I want the search to run quickly, as soon as the user has stopped typing. Can anyone help me with this?

Any ideas?

How does google do it?

I notice it does it in the advance search for the forum, for searching users.

[nagilum]

How does google do it?
Well, just have a look at their solution. This AJAX stuff is implemented in client-side javascript and thus public. All the Google functions are defined in http://www.google.com/ac.js