Changing the parent of an Animated 3D object in a script

I have the character jumping to a certain distance already done in Maya. I need to know how to script (transform.parent to the Unity Camera's) for it to work on time he jumps and gets Unity Camera for 2 seconds, and then (reassign it to the ImageTarget's transform) by the time he returns.

Frame 0-60 character enters and the target image, frame 61-75 he jumps to Unity Camera that need to be fixed as if holding the camera from Iphone, frame 75-120 he is holding in Unity Camera 121-135 frame it jumps back to the orginal image target position. it will be necessary to make a new animation in unity, beyond that already exists in Maya, to specify the distance from 3D character to Unity Camera within the unity?

How can I script that...