for (var i = 0; i <= areas.length - 1; i++) {
areas[i].addEventListener("mouseup", uiEvHandler, false);
areas[i].addEventListener("mousemove", uiEvHandler, false);
for (var i = 0; i <= areas.length - 1; i++) {
areas[i].addEventListener("mouseup", uiEvHandler, false);
areas[i].addEventListener("mousemove", uiEvHandler, false);