What is wrong with Line 4?

function onButton1Down(mouse) 
local w = game.Workspace:GetChildren() 
local i = 1, #w do 
local (w[i].className == "Camera") or (w[i].className == "Cam" .. game.Players.LocalPlayer.Character.Name) then 
local w[i].CameraSubject == game.Players.LocalPlayer.Character.Humanoid then                                              
 



local[i].CameraSubject = game.Workspace.SpaceShuttle.SpaceShuttle.Orbiter:findFirstChild("Camera1") 
local[i].CameraType = "Track"
local[i].Name = "Cam" .. game.Players.LocalPlayer.Character.Name 
local[i].CameraSubject = game.Players.LocalPlayer.Character.Humanoid
w[i].CameraType = "Custom"
end 
end 
end 
end 


function onSelected(mouse) 
mouse.Button1Down:connect(onButton1Down) 
end 

script.Parent.Selected:connect(onSelected) 

You keep using local which messes up the script. It's supposed to be used for variables such as local a = game.Workspace.Part. You also forgot the 'if' in the if statement at line 4.

function onButton1Down(mouse) 
	local w = game.Workspace:GetChildren() 
	for i = 1, #w do
		if w[i].className == "Camera" or w[i].className == "Cam"..game.Players.LocalPlayer.Character.Name then 
			if w[i].CameraSubject == game.Players.LocalPlayer.Character.Humanoid then                                              
				w[i].CameraSubject = game.Workspace.SpaceShuttle.SpaceShuttle.Orbiter:findFirstChild("Camera1") 
				w[i].CameraType = "Track"
				w[i].Name = "Cam" .. game.Players.LocalPlayer.Character.Name 
				w[i].CameraSubject = game.Players.LocalPlayer.Character.Humanoid
				w[i].CameraType = "Custom"
			end 
		end 
	end 
end 


function onSelected(mouse) 
	mouse.Button1Down:connect(onButton1Down) 
end 

script.Parent.Selected:connect(onSelected)