У вашего броузера проблема в совместимости с HTML5
Fabricated Auto-Return onto my log splitter. Splitter has just a single detent valve on it. So orginally to operate it you had to hold down handle for the ram to extend. Then push handle into reverse position in which it would stay due to single detent. Now all you have to do is push handle down and it the ram will go to full extension and retract all on its own. This can also be accomplished by purchasing a $275 Auto-Return Valve from Price Hydraulics. I couldn't justify spending that much on my old splitter. So I built my for free using scrap I had lying around.