Tilt
setTilt(tilt)
 Description
 Set the slope of the map. You can set it 0~60. The closer to zero(0), you look at the map from the top. The closer to sixty(60), the map have a three-dimensioanl effect. The default value is zero(0).
 Parameter
 tilt (number)
 Example
  map.setTilt(60); 0~60
getTilt()
 Description
 Gets the tilted value of the set map.
 Return Value
 tilt (number)
 Example
 map.getTilt()
return 60