Check existing username in database?

Hi there

Does anyone know of any javascript that would check for an entry in an Access database table, and alert the user if they are trying to re-enter the same value?

I’m afraid I’m not much of a coder and have been relying on Dreamweaver to help create a simple registration form. Dreamweaver has a function that allows it to check for an existing username and then divert you to another page to inform you of the error, but I’d rather have an alert message than a page redirect. Also the dreamweaver ‘check username’ function only applies if you are inserting a record, and does not work if you are simply updating a record (if you want to edit your personal details, for example).

If anyone can help with this, I’d really appreciate it. Thanks.

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