var image1=new Image()
image1.src="images/bike_lane.jpg"
var image2=new Image()
image2.src="images/race.jpg"
var image3=new Image()
image3.src="images/post1.jpg"
var image4=new Image()
image4.src="images/out2.jpg"
var image5=new Image()
image5.src="images/trail1.jpg"
var image6=new Image()
image6.src="images/on_road.jpg"