//If the browser supports image object, preload  images
function imageLoad()
{
if (document.images) {

  // about pics
  image_a1 = new Image();
  image_a1.src = "images/pic1_left.jpeg";

  image_a2 = new Image();
  image_a2.src = "images/pic2_main.jpeg";

  image_a3 = new Image();
  image_a3.src = "images/pic3_main.jpeg";

 image_a4 = new Image();
  image_a4.src = "images/pic4_main.jpeg";


  
 
}


}