I created an object in 3D max, after I imported it into atmosphere,the collision function was disabled: my avatar can go though the wall all the way although the collision function was setted. anybody can tell me how to make the collision function work properly ? thank you !

Atmosphere's default collision will not work with Viewpoint objects. Attach the following script to an imported Viewpoint Object to create a physical model from it and specify collision. Much more information about various options can be found in the Adobe Javascript API.

if(this.type == "ViewpointObject")
	{
	this.timestep = function(n, d)
		{
		if(this.loaded)
			{
			this.pm = this.createConvexPhysicalModel(0);
			this.pm.collide = true;
			removeAnimator(this);
			}
		}
	addAnimator(this);
	}

Thank you Preacherman, I try to use the below javascript, it workes:

teapot = new Object(); //land is some name, may be another
teapot.viewpointObject = this;

teapot.timestep = function(){
if (this.viewpointObject.loaded){
teapotPM = this.viewpointObject.createPhysicalModel(0);
teapotPM.collide = true;
removeAnimator(this);
}
}
addAnimator(teapot);