Check existence of standard `AbstractView::getComputedStyle` before proprietary `currentStyle` (need to test existence of `currentStyle` too, and bail out or fall back on something else if not found).
Check existence of standard `AbstractView::getComputedStyle` before proprietary `currentStyle` (need to test existence of `currentStyle` too, and bail out or fall back on something else if not found).

kangax/emile