function image() {
};

image = new image();
number = 0;

// imageArray
image[number++] = "<img src='/images/home/banner_photo_01.jpg'>"
image[number++] = "<img src='/images/home/banner_photo_02.jpg'>"
image[number++] = "<img src='/images/home/banner_photo_03.jpg'>"
image[number++] = "<img src='/images/home/banner_photo_04.jpg'>"
image[number++] = "<img src='/images/home/banner_photo_05.jpg'>"
// keep adding items here...

increment = Math.floor(Math.random() * number);