On Trigger Enter (No Rigidbody)

Hi,

Here's the scenario I'm trying to solve. I have spheres with colliders that move on random paths I have established. There are boxes with triggers on them that spawn in random parts of the scene. If a sphere enters a trigger I want it to stop. The trick to this is that I don't want to put a rigidbody on the sphere or the box. I've tried this and while it does make the sphere stop, it also makes things start to slide around and become unpredicatble.

Basically I'm looking for a way to use functionality like "OnTriggerEnter" without the extra step of using rigidbodies.

Any suggestions?

This is the code I'm currently using:

 function OnTriggerEnter (trigger:Collider) {
     if(trigger.tag == "sphere") {
         sphereSpeed = 0;
     }
 }