I would like to add an anti auto-submit feature to my add.cgi (Links SQL 2.05). Ideally I was thinking along the lines of the system AltaVista use, ie. generate an image containing a string of numbers and letters that must be entered into a field on the form by the user for the submission to be accepted.

Eg: http://addurl.altavista.com/addurl/new

I have found a few posts that mention this idea, but it doesnt appear that anyone has undertaken it as yet. It is certainly beyond my capabilities, and I was wondering how much one of you guys would charge to do this plugin for me.

Mark