How to turn a spawned enemy ( AI ) target on player?/ Why are my Hierarchy object turn prefab then no longer hold the transform object?

[BSVALVE]

Hi all unities,

Why are my Hierarchy object turned to prefab then no longer hold the transform object I set in hierarchy window before, how to turn a spawned enemy ( AI ) targeting on player?

Please show me javascript snippet thanks.

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thanks.

[system]

I think this should work

var target : GameObject;

function Start(){
    target = GameObject.Find("Player");
}