This page has a secured version of Plura technology embedded in it. You were most likely shown a pop-up box asking you if it was okay to run the Plura applet. Securing (otherwise known as signing) the applet, gives Plura some additional (but still safe) functionality that some of our customers require. Affiliates still have the same control over the use of compute resources as they do with the unsecured applet.
The following is a screenshot of the pop-up box that is shown to users:

Note that users must have Java 1.6 or above for Plura to start. If the correct version of Java is not installed, then Plura will not start and the pop-up box will not be shown.