another net.data question

hey all,

I'm working on a simple form for transaction input where I need to
verify several different items entered, most of which I can do using
simple javascript functions on an "onblur" event, but one in which I
need to verify the field against a 400 db2 file.

I can do the verification via an SQL statement, but I'm having brain
lock on how to embed a net.data function in javascript function.

My goal is to verify the item and throw up an alert() before
submitting the form to the next %html block, and to not have it behave
differently than the javascript alert() edits.

any ideas would be greatly appreciated.

Thanks,

Rick