Test pointerLockElement is null when a lock is pending.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS document.webkitPointerLockElement is null
     Lock.
PASS document.webkitPointerLockElement is null
PASS onwebkitpointerlockchange received after: Lock.
PASS document.webkitPointerLockElement is targetDiv1
     Unlock.
PASS document.webkitPointerLockElement is targetDiv1
PASS onwebkitpointerlockchange received after: Unlock.
PASS document.webkitPointerLockElement is null
PASS successfullyParsed is true

TEST COMPLETE