IMG has four attributes:
SRC is a required attribute that is assigned the filename or URL of the image to be linked.
ALIGN can be set to top, middle or bottom and indicates how text following a graphic should be aligned with the image.
<IMG SRC="newman.gif" ALIGN="middle">Newman Library
ALT specifies text data to be displayed instead of the graphic if the image cannot be displayed.
<IMG SRC="warning.gif" ALT="Warning!">
ISMAP is used to make an image a graphical navigation tool. More about this soon.