There are a number of options dealing mainly with page backgrounds and link colors. Onload and OnUnload options are not discussed here. List Tags . Both are also used to control levels of indentation. See Example .
Several pages give examples and source code.
The Image Tag . Images.htm has several examples and source code. If it does not load it serves to identify the missing image by name. These attributes are especially useful in reserving space beside or around and image as a buffer from text. A 2-pixel border is the default for images used as links unless something else is specified.