JobQueue -------- This is a simple way to run a batch of background tasks, in JavaScript. The concept is basically: 1. Create an instance of the JobQueue class 2. Create lots of instances of the Job class, and add them to the JobQueue 3. Run the JobQueue Could be used to: - preload images, AJAX, or other http requests - run a sequence of AJAX requests (e.g. for gathering lots of data)