function SUBImgPreload()
{
  var appVer=parseInt(navigator.appVersion);
  var isNC=(document.layers && (appVer >= 4)); // Netscape Navigator 4.0 or later
  var isIE=(document.all    && (appVer >= 4)); // Internet Explorer  4.0 or later
  if (isNC || isIE)
  {
    if (document.images)
    {
      var imgName = SUBImgPreload.arguments[0];
      var cnt;
      swImg[imgName] = new Array;
      for (cnt = 1; cnt < SUBImgPreload.arguments.length; cnt++)
      {
        swImg[imgName][SUBImgPreload.arguments[cnt]] = new Image();
        swImg[imgName][SUBImgPreload.arguments[cnt]].src = SUBImgPreload.arguments[cnt];
      }
    }
  }
}
function SUBImgFind(doc, imgName)
{
  for (var i=0; i < doc.layers.length; i++)
  {
    var img = doc.layers[i].document.images[imgName];
    if (!img) img = SUBImgFind(doc.layers[i], imgName);
    if (img) return img;
  }
  return null;
}
function SUBImgSwap(imgName, imgSrc)
{
  var appVer=parseInt(navigator.appVersion);
  var isNC=(document.layers && (appVer >= 4)); // Netscape Navigator 4.0 or later
  var isIE=(document.all    && (appVer >= 4)); // Internet Explorer  4.0 or later
  if (isNC || isIE)
  {
    if (document.images)
    {
      var img = document.images[imgName];
      if (!img) img = SUBImgFind(document, imgName);
      if (img) img.src = imgSrc;
    }
  }
}
var swImg; swImg=new Array;
SUBImgPreload('_SUB_ROLLOVER1', '../img/sub_19.gif', '../img/sub2_19.gif');
SUBImgPreload('_SUB_ROLLOVER2', '../img/sub_37.gif', '../img/sub2_37.gif');
SUBImgPreload('_SUB_ROLLOVER3', '../img/sub_39.gif', '../img/sub2_39.gif');
SUBImgPreload('_SUB_ROLLOVER4', '../img/sub_41.gif', '../img/sub2_41.gif');
SUBImgPreload('_SUB_ROLLOVER5', '../img/sub_47.gif', '../img/sub2_47.gif');
SUBImgPreload('_SUB_ROLLOVER6', '../img/sub_48.gif', '../img/sub2_48.gif');