Test for Bug 28633 - Submitting a form with target=_blank works only once

This test will click the first submit button twice, then press the space bar on the second submit button twice. Both should popup two blank windows.

Clicking first button, should open new window
PASS
Clicking first button, should open new window
PASS
Pressing space on second button, should open new window
PASS
Pressing space on second button, should open new window
PASS