BODY: Read-only
	#nonEditable: Read-only
		Directly inside a normal div.
		P: Read-only
			In a child of a normal div.
	#visible: Editable
		Directly inside a contenteditable.
		P: Editable
			In a child of a contenteditable.
	#nonVisible: Editable
		Directly inside a display:none contenteditable.
		P: Editable
			In a child of a display:none contenteditable.
	DIV: Read-only
		#nonVisibleParent: Editable
			Directly inside a contenteditable with a display:none parent.
			P: Editable
				In a child of a contenteditable with a display:none parent.