String.prototype.equalsIgnoreCase=equalsIgnoreCase;

function equalsIgnoreCase(arg) {
  return (new String(this.toLowerCase()) == (new String(arg)).toLowerCase());
}


function getBannerFilename() {
   var img = document.getElementById('banner');
   var url = ("" + document.location).split("/");
   var pagename = ("" + url[url.length - 1]).split("-");
   var blogger = pagename[0];

   if (blogger.equalsIgnoreCase("jsaragusa") ||
       blogger.equalsIgnoreCase("dvalentine")) {
     return "/Websites/celebrate/images/blogs/" + blogger + ".jpg";
   } else {
     return "/Websites/celebrate/images/main/img.celebrate.jpg";
   }
}

var bannerImg = new Image(1,1);
bannerImg.src = getBannerFilename();

function showBanner() {
  var img = document.getElementById('banner');
  img.src = bannerImg.src;
}