The Canvas 3D JS Libary (C3DL) is a JavaScript library that will make it easier to write 3D applications using WebGL. It provides a set of math, scene, and 3d object classes that makes WebGL more accessible for developers that want to develop 3D content in browser but do not want to have to deal in depth with the 3D math needed to make it work.
The site provides a set of very simple to follow tutorials to get you started. Using C3DL is not the hardcore approach, so some limitations may exist, but on the other hand it really simplifies things for basic model display and simple interaction.
It can load COLLADA models, wihch means that all Google Earth models can be used, you can find a huge collection at Google’s 3D Wharehouse.
C3DL even comes with a particle system generator so you can create very cool effects with very little effort.