pointson = new Image()
pointson.src = "../images/navaux3_points_over.gif"
pointsoff = new Image()
pointsoff.src = "../images/navaux3_points.gif"

solutionson = new Image()
solutionson.src = "../images/navaux3_solutions_over.gif"
solutionsoff = new Image()
solutionsoff.src = "../images/navaux3_solutions.gif"