1 Test calling lock when already in a locked state.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS document.pointerLockElement is null
8 PASS document.onpointerlockchange event received.
9 PASS document.pointerLockElement is targetdiv1
10 Locking targetdiv1, again.
11 PASS document.onpointerlockchange event received.
12 PASS document.pointerLockElement is targetdiv1
14 PASS document.onpointerlockchange event received.
15 PASS document.pointerLockElement is targetdiv2
16 PASS successfullyParsed is true