IntelliTXT is a piece of software developed by Vibrant Media. IntelliTXT is a script that website authors insert into their pages that will find keywords on the page and double underline them when a viewer views the page. When holding the mouse over the double underlined link, an advertisement associated with that word will pop up. Advertisers pay to have their ads associated with particular words. "Context" is considered ensuring that the ads are relevant to the web page hosting IntelliTXT.
Following the Help link in an IntelliTXT popup box leads to a page that offers to let you turn off IntelliTXT, but IntelliTXT ignores the request. This makes viewing pages with IntelliTXT more difficult, as the reader must be careful not to inadvertently mouse over a link, causing a delay while the page searches and generates a popup. The refusal to accept opt-outs or reply to requests is earning Vibrant Media animosity and complaints.
Competitors in the in-text advertising space include Kontera, Adbrite, Ontok and LinkWorth.
Programmer Brian Donovan has written a Greasemonkey script called Uh Oh IntelliTXT to block IntelliTXT popups for Firefox users. IntelliTXT can also be deactivated with the Adblock plus Firefox extension by using the string *Intellitxt* in your filter list.
To block IntelliTXT popups in Opera browser, simply add the url http://*.*.intellitxt.com/* into Tools > Advanced > Blocked Content.
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