function StringArray (n) {
  this.length = n;
  for (var i =1; i <= n; i++) {
    this[i] = ' '

  }
}

image = new StringArray(14)
image[0] = '/images/banner2.jpg'
image[1] = '/images/banner3.jpg'
image[2] = '/images/banner4.jpg'
image[3] = '/images/banner5.jpg'
image[4] = '/images/banner6.jpg'
image[5] = '/images/banner7.jpg'
image[6] = '/images/banner8.jpg'
image[7] = '/images/banner9.jpg'
image[8] = '/images/banner10.jpg'
image[9] = '/images/banner11.jpg'
image[10] = '/images/banner12.jpg'
image[11] = '/images/banner13.jpg'
image[12] = '/images/banner14.jpg'
image[13] = '/images/banner15.jpg'

var ran = 60/image.length

function ranimage() {
  currentdate = new Date()
  core = currentdate.getSeconds()
  core = Math.floor(core/ran)
    return(image[core])
}

document.write("<img src='" +ranimage()+ "'>")