<!--
window.onload=function(){
  //this is where you place the images you want to use
  var banners = ["masthead_01.jpg", "masthead_02.jpg", "masthead_03.jpg"];
 
  //be sure to change the front part of the url
  document.getElementById("masthead").style.backgroundImage = 
    "url(/assets/images/masthead/" + 
    banners[Math.floor(Math.random()*banners.length)] +")";
}
//-->