On your webserver you can install x2goplugin-provider. The package
contains a little example that shows how to configure a webpage, so
that the x2goplugin gets launched once the webpage is visited.The x2goplugin package has to be installed on the systems from where
the browser connects to the x2goplugin-provider site.
This plugin will connect and accept my login password (and will show my suspended session) but will crash at connecting to it. Source and destination are both Ubuntu 12.04.