Yahoo has added a button on its main Web site linking to a page that lobbies shareholders to vote against Carl Icahn's plans for the company, stepping up its rhetoric in the days leading up to its annual meeting.

The page, reached via a button that reads "Your Yahoo! Your Vote," clearly tries to discredit Icahn, who has proposed a new board of directors for Yahoo in hopes of facilitating a deal with Microsoft.

Featured on the page is a chart listing companies that Yahoo says Icahn has been involved with and noting how the stock price of each of the companies has changed since his involvement, dating back to 2004. According to Yahoo, of the 15 companies on the list, all but three have seen their stock prices decline. The companies include struggling concerns such as Motorola and Blockbuster.

In bold type at the very top of the page, Yahoo quotes Icahn from a Wall Street Journal article as saying, "It's hard to understand these technology companies," in an apparent attempt to portray Icahn as unable to make an informed plan regarding a technology company like Yahoo.

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