Here is an internet article from PC World on Pop ups; its self explanatory:
Bye-Bye, Pop-Ups. Hello…?
Use of pop-ups wanes, but worse intrusions may be coming.
– Liane Cassavoy
From the April 2004 issue of PC World magazine
Posted Monday, March 08, 2004
Pop-up ads, those reviled windows that intrude on your Web surfing, seem to be on the decline. But don’t celebrate yet: New forms of advertising that may be just as annoying and even more intrusive are likely to replace them.
Thwarted by both ISPs and blocking utilities, use of pop-ups has waned over the past year. Internet advertising analysts say Microsoft’s decision to put a pop-up stopper into the next version of Internet Explorer hastens their demise, but no one expects them to disappear soon. And new styles of ads, including screen-grabbing full-motion videos and rich media that overwrite the screen, are starting to appear.
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“All these technologies will contribute to the downfall of pop-ups,” says Jupiter Research associate analyst Nate Elliott. But decline isn’t the same as imminent death: “Pop-ups will be a viable advertising medium for several years to come,” he adds.
Pop-up ads originated with adult-content Web sites, but have become prevalent at mainstream sites (including PCWorld.com). In December 2001, according to data from Nielsen//NetRatings’ AdRelevance service, 1.4 percent of all Web ads were pop-ups or pop-unders. By July 2003, pop-up and pop-under ads hit their peak at 8.7 percent of all online ads. Six months later, during the height of the holiday shopping season, their use had plummeted by nearly 30 percent, accounting for about 6.3 percent of all online ads.
Doing the Job
Why did pop-ups become so pervasive? They are 13 times more effective at generating clicks than standard banners, according to 2003 research by ad firm Advertising.com.