var imgUrl = "../images/masthead/";
var imgArray = new Array("masthead01.jpg", "masthead02.jpg", "masthead03.jpg", "masthead04.jpg", "masthead05.jpg", "masthead06.jpg", "masthead07.jpg");
var imgHeight = "129";
var imageWidth = "542";  
 
var currentdate = 0;
var core = 0;
var ran = 60/imgArray.length;
 
 function ranimage() {
  currentdate = new Date();
  core = currentdate.getSeconds();
  core = Math.floor(core/ran);
  
  return(imgArray[core]);}

 
 document.write('<img src="' + imgUrl + ranimage() + '" width="' + imageWidth  +'" height="' + imgHeight  +'" border=0>');