Thanks for your reply. I was excited to run across the link to your graphs because you used gnuplot and the web interface is the same idea as what I need to do.

It appears that I do need to send the image data to the browser though. This will be on a secure server that is out of my control. The people in charge have not been very supportive of on-the-fly graph generation. I've been doing some testing hoping I could find a way to write the file to the server but a cgi program cannot write a file because of the security restraints.