Hi guys,

So I am fairly new to html, css and javascript, but I am making a selection of pages to test out all kinds of things. The main thing I am having issues with is the "smoothness" of transitions.

Specifically, visit http://blah.eu5.org/stm/ and observe the "bubbles". I am simply offsetting the background image of 3 divs to give the appearance of the bubbles "rising" without being too much of a hog on resources. What I end up getting, is this jerky movement. What is the simple way to avoid this, as many other examples I am looking at look very smooth.