Frames allow you to split the browsers window up in to as many sections as you like, each capable of displaying its own document. Usually used for displaying a list of Contents (Links) on left side of the browser, which once clicked, display a document on the right side. When using frames, it's important you use the <!Doctype html public "-//wc3/dtd html 4.0 Final//en"> tag. As frames were only recognized by the w3c (world wide web consortium) as of version 4, the doctype tag ensures the file is correctly interpreted.
To use frames on a page we use <frameset> tag instead of <body> tag. The <frameset> tag defines how to divide the window into frames. The rows attribute of <frameset> tag defines horizontal frames and cols attribute defines vertical frames. Each frame is indicated by <frame> tag and it defines which HTML document shall open into the frame.
