It's been barely two months since Microsoft made a pop-up blocker available for its Internet Explorer browser--but Web advertisers have already found a way to slip their loathed marketing pitches past it.
Service Pack 2 (SP2), Microsoft's security update to Windows and Internet Explorer, recently armed 40 million people with tools to automatically suppress advertising windows that spring up, over or behind requested Web pages. Couple that with the millions who have downloaded free pop-up-blocking toolbars from Google, Yahoo, MSN and others, and nearly half the Web audience in the United States has voted against pop-up ads, according to several estimates from ad-serving companies.
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