Web Development Monitoring Plugin

So basically what I am building is a monitoring system. This system will monitor a number of applications and the user, with one look, should be able to see how all the applications are performing.

What I am looking for is a plugin (ideally JavaScript based) that changes colour for each application depending on the state that that application is in.

Example: Running normally - Green Experiencing high volume - Yellow Down/Maxed out - Red No data received - White

Does anybody have any suggestions on a plugin that would be good for this?

Thanks :)