Why is Unity 5 Not allowing me to Destroy an Object???

Hello,
I am getting a compiler error from Unity 5 on my javascript file for tring to Destroy the player object if the lives are reduced to 0. The error message implies that the Destroy is an Unknown identifier. Here is the pic of the source code.

PLEASE HELP!

try

Destroy(this.gameObject);

Because it’s spelt Destroy(), not Destory()