scrolling attribute of the iframe tag (XHTML 1.0)

The scrolling attribute of the iframe tag defines how content that exceeds the frame window should be treated. It has three possible values: yes, no or auto. The no option leaves the window without scrollbars, while the yes options  usually renders the iframe with constant scrollbars, no matter if the content is too big for the window or not. The auto option, which is the default, renders scrollbars only when necessary.