This page is part of the WebCom Web Publishing Guide. It provides pointers on debugging clickable images included in a HTML document.

If the image doesn't appear, or isn't clickable, then the problem is likely one of the errors below:

1. The ISMAP tag is missing.
2. The closing quote mark in either the IMG SRC declaration (which causes an image to be displayed within a HTML document) or the hotlink to the map file has been left off.
3. The anchor </A> closing the hotlink is missing.
4. Some other typo (spelling error, dropped letter, etc.).

If the image doesn't show up, test the IMG SRC portion separately. The name of the file might have been mis-typed or the path to it may be incorrect.

If clicking on certain areas of the images produces an error message, then check to see whether the map file contains a default URL, and that it is the last line in the map file.

Note: make sure you are using the appropriate program for your format:

If your map file uses the NCSA format, the URL should look like this:
http://webcom.com/~webcom/userid/path/file.map

If your map file uses the CERN format, the URL should look like this:
http://webcom.com/~webcom/cgi-bin/htimage/~userid/path/file.map