function preload() {
if(document.images){
//images for pages
image1 = new Image();
image2 = new Image();
image3 = new Image();
image4 = new Image();


image1.src = "flash/thumb_1.png";
image2.src = "flash/thumb_2.png";
image3.src = "flash/thumb_3.png";
image4.src = "flash/thumb_4.png";
}
}