What would the Web be without web pages? What are web pages, anyway? It's obvious that web pages have a lot of stuff in them and that they consist of a variety of different kinds of this stuff. For instance, lots of web pages have text, and lots also have images. Some web pages have videos. Yet others have tables full of price lists or comparison charts.

All this stuff that's in web pages consists of, like the Lego sets you may have played with as a child, lots of different pieces, called elements, that when put together in a certain way result in the page you see. Thus, a single web page can really be broken down into many different individual elements. In fact, that's exactly what web developers ...

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