gCanvas.addEventListener("touchcancel", mapEvHandler, false);
gCanvas.addEventListener("touchleave", mapEvHandler, false);
gCanvas.addEventListener("touchcancel", mapEvHandler, false);
gCanvas.addEventListener("touchleave", mapEvHandler, false);
gCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
gCanvas.addEventListener("mousewheel", mapEvHandler, false);
gCanvas.addEventListener("DOMMouseScroll", mapEvHandler, false);
gCanvas.addEventListener("mousewheel", mapEvHandler, false);