var currentdate = 0
var core = 0

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

  }
}

image = new StringArray(13)
image[0] = '../courses/images/appraisal.jpg'
image[1] = '../courses/images/group.jpg'
image[2] = '../courses/images/telephone.jpg'
image[3] = '../courses/images/time.jpg'
image[4] = '../courses/images/food_service.jpg'
image[5] = '../courses/images/kitcehn_profit.jpg'
image[6] = '../courses/images/advertising.jpg'
image[7] = '../courses/images/checklist.jpg'
image[8] = '../courses/images/servewise1.jpg'
image[9] = '../courses/images/superviser_skills.jpg'
image[10] = '../courses/images/making_bed.jpg'
image[11] = '../courses/images/room_sales.jpg'
image[12] = '../courses/images/servewise2.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()+ "'>")