function init () { st_onload(); 
  var randomValue =  Math.floor(Math.random() * 4) + 1; 
  var mastheadImage =  GetObjRef ("MastheadImage"); 
  if (mastheadImage) 
    { mastheadImage.src = "/download/892/masthead/0" + randomValue + "masthead.jpg"; }  
}