//Preload category images
Image1 = new Image(140,104);
Image1.src = "categories/sports-off.jpg";
Image2 = new Image(140,104);
Image2.src = "categories/sports-on.jpg";
Image3 = new Image(140,104);
Image3.src = "categories/night-off.jpg";
Image4 = new Image(140,104);
Image4.src = "categories/night-on.jpg";
Image5 = new Image(140,104);
Image5.src = "categories/construction-off.jpg";
Image6 = new Image(140,104);
Image6.src = "categories/construction-on.jpg";
Image7 = new Image(140,104);
Image7.src = "categories/learning-off.jpg";
Image8 = new Image(140,104);
Image8.src = "categories/learning-on.jpg";
Image9 = new Image(140,104);
Image9.src = "categories/trips-off.jpg";
Image10 = new Image(140,104);
Image10.src = "categories/trips-on.jpg";
Image11 = new Image(140,104);
Image11.src = "categories/bonding-off.jpg";
Image12 = new Image(140,104);
Image12.src = "categories/bonding-on.jpg";