function image()  {

    var number = 0;

    // imageArray
    image[number++] = "<img src='http://shop.dottormusica.com/js/fullscreen/1.jpg'/>"
    image[number++] = "<img src='http://shop.dottormusica.com/js/fullscreen/2.jpg'/>"
    image[number++] = "<img src='http://shop.dottormusica.com/js/fullscreen/3.jpg'/>"
    image[number++] = "<img src='http://shop.dottormusica.com/js/fullscreen/4.jpg'/>"
    image[number++] = "<img src='http://shop.dottormusica.com/js/fullscreen/5.jpg'/>"

    var increment = Math.floor(Math.random() * number);
    return increment;
}