Links are "buttons," or jumps, to other WWW documents. They may also take you to another section in the current WWW document. WWW documents may contain both textual and graphical links. Textual links are text which are emphazied by being a different color than the rest of the text, and may be underlined. Once a textual link is used, it will become another color, indicating it was used.
Graphical links are graphics which serve as links, or buttons, to other sections or documents. For example, the buttons on the left are graphical links. You can determine a graphical links two different ways. First, the mouse arrow will turn into a hand with a finger pointing towards the top of the screen. Graphcial links may also contain a colored "boxed" border arround it, which should be the same color as the textual links.