<a href="http://www.espn.com" target="_blank"> <img src="ahman.gif"> </a>
Notice that by default, many browsers add a small border around image links. This is to quickly deceifer the difference between image links and just ordinary images on a web site. Since this default is different from web browser to web browser it may be best to squelch this ambiguity by setting the border attribute to zero.
<a href="http://www.espn.com" target="_blank"> <img src="ahman.gif" border="0"> </a>
Image Link; No Border:
HTML – Thumbnails
Thumbnails are small size (Kilobytes) pictures that link to the larger, high quality picture. To make a thumbnail save a low-quality version of a picture and make it have smaller dimensions. Now make this low-quality picture into an image link and have it point to the the high-quality picture.
<a href="sunset.gif"> <img src="thmb_sunset.gif"> </a>