polyline-googlemaps-mouselistener, uses all the powe of googlemaps javascr ipt api V3, in this application, hight ligths effect a a map with a mouse listener, move the mouse away from the polygon, When that event triggers, color to blue.-polyline-googlemaps-mouselistener, uses all the powe　of googlemaps javascr ipt api　V3,　in this application, hight ligths effect a　a map with a mouse listener, move the mouse away from the polygon, When that event triggers,　color　to blue.