JavaScript adds extra functions to web pages. Examples include small pop-up windows and images that change when you pass a mouse pointer over them. JavaScript functions may not work with some browsers or older browser versions. Sites that rely on Flash or Shockwave require a 'plug-in' to work. It may already be installed on your system.
Frames divide up a web page into a number of independent windows.
Printing Problems Web pages can be printed using the print command in your browser. Some pages are not designed for printing and may be difficult to read on paper. If a page uses frames, the printer may only print the contents of the first frame. To get around this problem, first select the frame with the content you want and then print. If the page uses light-coloured text on a dark background, the text may not print.