var filename = location.pathname;
var file_array=filename.split("/");

crystals = new Array
crystals[0] = "/crystals/apatite_channel.jpg"
crystals[1] = "/crystals/nacl.jpg"
crystals[2] = "/crystals/lifepo4.jpg"
crystals[3] = "/crystals/surface.jpg"
crystals[4] = "/crystals/lattice.jpg"
crystals[5] = "/crystals/perovskite.jpg"

crystalnumber = crystals.length

var random_crystal = Math.floor(crystalnumber * Math.random())

inaugural = new Array
inaugural[0] = "apatite.jpg"
inaugural[1] = "hybrid.jpg"
inaugural[2] = "nacl-closepacked.jpg"
inaugural[3] = "lifepo4.jpg"
inaugural[4] = "fuelcellcar.jpg"
inaugural[5] = "fuelcellbus.jpg"
inaugural[6] = "rabbit.jpg"
inaugural[7] = "fccar.jpg"
inaugural[8] = "escher.jpg"

inauguralnumber = inaugural.length

var random_inaugural = Math.floor(inauguralnumber * Math.random())

var image = crystals[random_crystal]  /* Default image */

/* Top page */

if (file_array[file_array.length-2] == "msi20" &&
  (file_array[file_array.length-1] == "index.shtml" || file_array[file_array.length-1] == ""))
  image = "msislam.jpg";
else

/* Members */

if (file_array[file_array.length-2] == "members" &&
  (file_array[file_array.length-1] == "index.shtml" || file_array[file_array.length-1] == ""))
  image = "muppets.jpg";
else

/* Publications */

if (file_array[file_array.length-2] == "publications" &&
  (file_array[file_array.length-1] == "index.shtml" || file_array[file_array.length-1] == ""))
  image = "journals2.jpg";
else

/* Conferences */

if (file_array[file_array.length-2] == "conferences")
  image = "lecture.jpg";
else

/* News */

if (file_array[file_array.length-2] == "news" &&
  (file_array[file_array.length-1] == "index.shtml" || file_array[file_array.length-1] == ""))
  image = "newspaper.jpg";
else

/* Inaugural lecture */

if (file_array[file_array.length-2] == "inaugural")
  {
  if (file_array[file_array.length-1] == "index.shtml" || file_array[file_array.length-1] == "")
    image = "dali.jpg";
  else
    image = "/inaugural/" + inaugural[random_inaugural];
  }
else

/* Faraday discussion meeting 134 */

if (file_array[file_array.length-2] == "fd134")
  image = "faraday_new.jpg";
else

/* Committies */

if (file_array[file_array.length-1] == "committies.shtml")
  image = "apatite.jpg";
else

/* Vacancies */

if (file_array[file_array.length-1] == "vacancies.shtml")
  image = "agcl.jpg";
else

/* Family gallery */

if (file_array[file_array.length-2] == "social")
    image = "incredibles.jpg";

document.write("<img src=\"/msi20/images/"+image+"\" height=\"120\" width=\"133\" />");