images = new Array(6);

images[0] = "<img src='/images/main1.jpg' border='0'>";

images[1] = "<img src='/images/main2.jpg' border='0'>";

images[2] = "<img src='/images/main3.jpg' border='0'>";

images[3] = "<img src='/images/main4.jpg' border='0'>";

images[4] = "<img src='/images/main5.jpg' border='0'>";

images[5] = "<img src='/images/main6.jpg' border='0'>";

images[6] = "<img src='/images/main7.jpg' border='0'>";

images[7] = "<img src='/images/main8.jpg' border='0'>";

images[8] = "<img src='/images/main9.jpg' border='0'>";

index = Math.floor(Math.random() * images.length);

document.write(images[index]);