Blue dot is a CGI tracking and Web site activity
measurement script which generates Apache combined
style access log files. These log files can be analyzed
with most standard log analysis tools to track a site's
popularity, referrers, hosts, etc. The logging is based
on inserting a small piece of JavaScript or SSI code into
every Web page. This code requests a very small blue
dot image from a server where the call is logged. Blue
dot can also be configured to set and log session and
persistent cookies. This can be used, for example, to
track pay-per-click search engine ROI.
