//-----------------rotation images------------------
var newBanner = Math.floor(Math.random()*4);

var current_image = "";
var t;

//front image rotation
function startRotation(){

  newBanner++;

  if (newBanner > 3) {
    newBanner = 0;
  }

  if (newBanner < 0) {
    newBanner = 3;
  }

  var filename = "rotation" + newBanner + ".jpg"; 
  var location = "/alumni";

  current_image = "http://www.usask.ca/alumni/images/rotation_images/"+filename;

  document.getElementById('pic').src = current_image;
  document.getElementById('link').href = location;
}