function randomImage() {var headImages = new Array(
'http://www.nuigalway.ie/images/buildings/1000/inside_quad_red.jpg',
'http://www.nuigalway.ie/images/buildings/1000/it_at_night.jpg',
'http://www.nuigalway.ie/images/buildings/1000/cairnes.jpg',
'http://www.nuigalway.ie/images/buildings/1000/art_mill.jpg',
'http://www.nuigalway.ie/images/buildings/1000/inside_quad_arch.jpg',
'http://www.nuigalway.ie/images/buildings/1000/inside_quad_grass.jpg',
'http://www.nuigalway.ie/images/buildings/1000/civil_eng.jpg',
'http://www.nuigalway.ie/images/buildings/1000/it_at_dusk.jpg',
'http://www.nuigalway.ie/images/buildings/1000/front_mri.jpg',
'http://www.nuigalway.ie/images/buildings/1000/inside_quad.jpg',
'http://www.nuigalway.ie/images/buildings/1000/walking_by_mri.jpg',
'http://www.nuigalway.ie/images/buildings/1000/front_mri_ppl.jpg',
'http://www.nuigalway.ie/images/buildings/1000/top_it.jpg',
'http://www.nuigalway.ie/images/buildings/1000/front_quad.jpg',
'http://www.nuigalway.ie/images/buildings/1000/walkway.jpg',
'http://www.nuigalway.ie/images/buildings/1000/quad_tower.jpg',
'http://www.nuigalway.ie/images/buildings/1000/close_view_clock_tower.jpg',
'http://www.nuigalway.ie/images/buildings/1000/yoke.jpg',
'http://www.nuigalway.ie/images/buildings/1000/inside_quad.jpg'
);
var max = headImages.length;
var num = Math.floor((Math.random() * max));
if (document.getElementById) {
  var headerImageDiv = document.getElementById('logoimage');
  if (headerImageDiv) {
    headerImageDiv.style.backgroundImage = "url(" + headImages[num] + ")";
  }
}
return;
}