First, let’s read a little story.
Once upon a time, in the online kingdom of the World Wide Web, there lived two brothers who were known as the Pop brothers.
The online kingdom of the world-wide-web
The older - named Pop-Up - was a noisy, annoying, in-your-face, slick and sleazy brat.
His younger brother - named Pop-Under - was a shy, well-mannered and gentle soul who always waited his tur...