iFrame (W3C)

The Code

<iframe src="one.htm" width=""  height="" seamless="seamless" target="frameOne" frameborder="no" scrolling="no"></iframe>

First page that loads when main page is loaded
<a href="one.htm" target="frameOne">intro</a>

Next page that will load after user interaction
<a href="two.htm" target="frameOne">one</a>

src = the first page that appears in the iframe
target = area where the page will appear
width = width of the iframe
height = height of the iframe
seamless = will eliminate scrollbars
frameborder = only included for older browsers
scrolling = only included for older browsers