I am building an idea capture website from the Array Shift installation profile of drupal and I'm trying to create a similar entry lookup for when a user starts to create a new idea. Is there a way I can detect when the user is typing text into the title field of the create new idea form (a new content type I created in cck) and then, using ajax, create a dynamic dropdown list of all other posted ideas that are similar based on custom sql queries I create? I've seen this done in many 3rd party COTS tools for idea capture, not to mention right here in Stackoverflow, and I'm hoping to do the same in drupal. Right now, the only ways I can think of to do this is to hack the cck module, which I know is not a good idea, or to somehow hook into that form somehow. I'm not sure how to do that. Do I use hook\_form\_alter()? I'm using drupal 6.16 and CCK 6.x-2.7. Thanks.