/**
 *  Test for MS IE in order to adjust layout.
 *  @var boolean    if CSS1 compatable then true else false
 */
var isIe = false;

if (document.compatMode == "BackCompat" && document.all) {
  isIe = true;
}

/**
 *  Swap an image by changing its src
 *
 *  @param string id    ID attribute of image element to change
 *  @param object img   image object
 *
 *  @return void
 */
function swapImg(id, img)
{
  document.getElementById(id).src = img.src;
}