ver4 = (document.layers || document.all) ? 1 : 0;

function preLoadIm(arImLoad) {
  if (!document.images) return; 
  arImList = new Array();
  for (counter in arImLoad) {
    arImList[counter] = new Image();
    arImList[counter].src = arImLoad[counter];
  }
}

function swapIm(imName,imSrc) {
  if (!document.images) return;
  document.images[imName].src = imSrc;
}

function rollClick(imName,imSrc) {
  if (!document.images || ver4) return;
  whichIm = document.images[imName];
  tmpSrc = whichIm.src
  whichIm.src = imSrc;
  dummy = setTimeout("whichIm.src = \""  + tmpSrc + "\"", 100);
}