//
function newImage(arg) {
   if (document.images) {
      rslt = new Image();
      rslt.src = arg;
      return rslt;
   }
}

function changeImages() {
   if (document.images && (preloadFlag == true)) {
      for (var i=0; i<changeImages.arguments.length; i+=2) {
         document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
      }
   }
}

var preloadFlag = false;
function preloadImages() {

// alert('yadda yadda yadda');

   if (document.images) {

btopover = newImage("/images/btopover.gif");

      preloadFlag = true;
   }
}