Register. Only your email address is required. (It will be used as your login.)
Log in and enter the domain name of your web site where you want to show graphs.
(e.g. the domain of page http://cabalsoft.wz.cz/index.php is "cabalsoft.wz.cz".)
Create an input XML file, which will be used as a data source for the chart. Of course, you can call a script file instead which generates an XML file (e.g. based on data from a SQL database).
Insert an image in your web page source. The URL of the picture points to our script with the URL of your XML file as parameter:
<img src="http://grafy.jiricabal.cz/src/getgraph.php?xml=http://cabalsoft.wz.cz/data-med.xml" alt="graph" />