<img border=#> sets the border size of an image
The image border is the line that appears around the edge of a picture placed on a Web page. Normally, this border will appear only if you use the image as a link. You can, however, create a border of any size around your image by using the <img border=#> tag, and replacing the # with a border size, from 0 to 99.
Perhaps more important, you can prevent a border from appearing around a linked image by setting the border size to zero (<img border=0>).
To add a border to our little monkey, do this:
<img border=5 src="/webmonkey/kids/lessons/stuff/monkey.gif">