Toggling 2 texture when target is true or not

[123noob]

So I have 2 textures where one is just a background and the other is a frame for target. Can you tell me how to toggle the textures to change when I have a target selected?

[Lozareth]

OnLoad:
this:RegisterEvent("PLAYER_TARGET_CHANGED")

OnEvent:
if UnitName("target") then
DART_Show(#);
DART_Hide(#);
else
DART_Show(#);
DART_Hide(#);
end

Change # to the id of the texture to show or hide.

[123noob]

Thz Loz... and it b/c of ur mods that brought me back into WOW after 3 months quiting ghahahha... i mean i should say... dam u LOZ for bringing me back into the no life zone