<iframe>

iFrames are windowed frames allowing for viewing of multiple HTML documents through a single window browser. Supported by numerous browsers.

Attribute Description
align Horizontally align various tags or content.
class Classify or name your elements. For instance, if you classify several paragraph elements the same name, using CSS it is possible to give them all the same styles in one line of code.
frameborder For use with frames, 0 being no border, and 1 being with a border.
height Define an element's height using a numeric pixel value or a percentage.
id Specify an ID for your elements.
marginheight Define a numeric pixel value for the vertical margin.
marginwidth Define a numeric pixel value for the width of your margins.
name Choose a name for an element. Names can be used with other web programming languages to unify your site or run scripts obtaining user info.
scrolling A yes value always allows scrolling; a no value disables scrolling; and an auto sets the browser to auto detect.
src Provide a source URL for images or other content. Use local URLs or internet URLs.
style Used to create inline styles such as CSS.
title Places a "pop-up" title for an element upon mouse over. Similar to "help" pop-ups in word programs.
valign Vertically align an element.
width Define the width of an element with a numeric pixel value or a percentage.

Code:

<frameset>
<iframe height="100" width="300" frameborder="0" src="http://www.google.com/">
</frameset>

Display: