This test checks that the lowsrc attribute of img tags are accessible via JavaScript.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS image.lowsrc is 'http://hostname/lowsrc.png'
PASS image.lowsrc is 'http://hostname/newlowsrc.png'
PASS successfullyParsed is true
TEST COMPLETE