var productImages = [];

// Preloaded image. ID = 81
productImages[81] = new Image();
productImages[81].src="/image/product/medium/saveourplanet_a.jpg";
productImages[81].alt = "Save our planet pencil case";

         

// Preloaded image. ID = 82
productImages[82] = new Image();
productImages[82].src="/image/product/medium/saveourplanet_b.jpg";
productImages[82].alt = "Save our planet pencil case";

         

// Preloaded image. ID = 83
productImages[83] = new Image();
productImages[83].src="/image/product/medium/saveourplanet_c.jpg";
productImages[83].alt = "Save our planet pencil case";

         
function swapImage(image) {
   document.prodImageMain.src = productImages[image].src; 
}