function randomSmallImage() { 

var smallImages = new Array(

'http://www.nuigalway.ie/medicine/images/headers/Image1.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image2.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image3.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image4.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image5.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image6.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image7.jpg',

'http://www.nuigalway.ie/medicine/images/headers/Image8.jpg'

);

var max = smallImages.length -1;

var num = Math.floor((Math.random() * max));

if (document.getElementById) {

  var smallImageDiv = document.getElementById('rightbarimage');

  if (smallImageDiv) {

    smallImageDiv.style.backgroundImage = "url(" + smallImages[num] + ")";

  }

}

return;

}