Hi, I have no idea where to look for this or what its even called. What I am trying to find is a way to add a Random text graphic to my page when a person tries to perform a task (such as logging in with the wrong password) repeatedly. This is to prevent robots from hacking away or submitting data repeatedly to my site.
Examples would be the youtube comments. If you submit several comments in a short time period it will display a small graphic with random text when you try to submit a comment again. I need this on my page. I'm not sure if this is implemented with javascript / html / vb.net / asp.net or whatever. I really just need someone to point me in the right direction. I am using asp.net so I need a solution compatable with that. Thanks!
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