In Applescript, how can I find out if a menu item is selected/focused?

tell application "System Events"
    tell (first process whose frontmost is true)
    	set helpMenuItem to menu bar item "Help" of menu bar 1
    	click helpMenuItem
    end tell
end tell

tell application "System Events"
    tell (first process whose frontmost is true)
    	set helpMenuItem to menu bar item "Help" of menu bar 1
    	set searchBox to menu item 1 of menu of helpMenuItem
    	if (searchBox's focused) = true then
    		key code 53 -- type esc
    	else
    		click helpMenuItem
    	end if
    end tell
end tell

tell application "System Events"
    tell (first process whose frontmost is true)
    	set helpMenuItem to menu bar item "Help" of menu bar 1

    	-- Use reference form to avoid building intermediate object specifiers, which Accessibility apparently isn't good at resolving after the fact.
    	set searchBox to a reference to menu item 1 of menu of helpMenuItem
    	set searchField to a reference to text field 1 of searchBox

    	if searchField's focused is true then
    		key code 53 -- type esc
    	else
    		click helpMenuItem
    	end if
    end tell
end tell

tell application "Adobe Illustrator"
activate
tell application "System Events"
	tell process "Illustrator"
		set frontmost to true
		set activeMenuItem to enabled of menu item "Unlock All" of menu "Object" of menu bar item "Object" of menu bar 1
		if activeMenuItem is true then
			tell me to beep 3
		else
			tell me to beep 2
		end if
	end tell
end tell
end tell