var whichImage = 0


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

  }
}

image = new StringArray(4)
image[0] = 'images/top_image.jpg'
image[1] = 'images/top_image4.jpg'
image[2] = 'images/top_image5.jpg'
image[3] = 'images/top_image6.jpg'
//image[4] = 'images/head5.jpg'
//image[5] = 'images/head6.jpg'
//image[6] = 'images/head.jpg'
//image[7] = 'images/results.jpg'
//image[8] = 'images/head.jpg'
//image[9] = 'images/results.jpg'

var totalImg = image.length

function randomimage() {
var whichImage = Math.round(Math.random()*(totalImg-1));
    return(image[whichImage])
}

document.write("<img src='" +randomimage()+ "' align='right'>")