function qrsImgPreload()
{
  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 = qrsImgPreload.arguments[0];
      var cnt;
      swImg[imgName] = new Array;
      for (cnt = 1; cnt < qrsImgPreload.arguments.length; cnt++)
      {
        swImg[imgName][qrsImgPreload.arguments[cnt]] = new Image();
        swImg[imgName][qrsImgPreload.arguments[cnt]].src = qrsImgPreload.arguments[cnt];
      }
    }
  }
}

function qrsImgFind(doc, imgName)
{
  for (var i=0; i < doc.layers.length; i++)
  {
    var img = doc.layers[i].document.images[imgName];
    if (!img) img = qrsImgFind(doc.layers[i], imgName);
    if (img) return img;
  }
  return null;
}

function qrsImgSwap(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 = qrsImgFind(document, imgName);
      if (img) img.src = imgSrc;
    }
  }
}
var swImg; swImg=new Array;

qrsImgPreload('_qrs_ROLLOVER1', 'img/top_22.gif', 'img/top2_22.gif');
qrsImgPreload('_qrs_ROLLOVER2', 'img/top_13.gif', 'img/top2_13.gif');
qrsImgPreload('_qrs_ROLLOVER3', 'img/top_15.gif', 'img/top2_15.gif');
qrsImgPreload('_qrs_ROLLOVER4', 'img/top_42.gif', 'img/top2_42.gif');
qrsImgPreload('_qrs_ROLLOVER5', 'img/top_64.gif', 'img/top2_64.gif');
qrsImgPreload('_qrs_ROLLOVER6', 'img/top_32.gif', 'img/top2_32.gif');