function HpbImgPreload()
{
  var appVer=parseInt(navigator.appVersion);
  var isNC=false,isN6=false,isIE=false;
  if (document.all && appVer >= 4) isIE=true; else
    if (document.getElementById && appVer > 4) isN6=true; else
      if (document.layers && appVer >= 4) isNC=true;
  if (isNC||isN6||isIE)
  {
    if (document.images)
    {
      var imgName = HpbImgPreload.arguments[0];
      var cnt;
      swImg[imgName] = new Array;
      for (cnt = 1; cnt < HpbImgPreload.arguments.length; cnt++)
      {
        swImg[imgName][HpbImgPreload.arguments[cnt]] = new Image();
        swImg[imgName][HpbImgPreload.arguments[cnt]].src = HpbImgPreload.arguments[cnt];
      }
    }
  }
}
// HpbImgFind:
//
function HpbImgFind(doc, imgName)
{
  for (var i=0; i < doc.layers.length; i++)
  {
    var img = doc.layers[i].document.images[imgName];
    if (!img) img = HpbImgFind(doc.layers[i], imgName);
    if (img) return img;
  }
  return null;
}
// HpbImgSwap:
//
function HpbImgSwap(imgName, imgSrc)
{
  var appVer=parseInt(navigator.appVersion);
  var isNC=false,isN6=false,isIE=false;
  if (document.all && appVer >= 4) isIE=true; else
    if (document.getElementById && appVer > 4) isN6=true; else
      if (document.layers && appVer >= 4) isNC=true;
  if (isNC||isN6||isIE)
  {
    if (document.images)
    {
      var img = document.images[imgName];
      if (!img) img = HpbImgFind(document, imgName);
      if (img) img.src = imgSrc;
    }
  }
}


var swImg; swImg=new Array;
HpbImgPreload('_hpb_rollover7', 'images/top_banner_01.jpg', 'images/top_banner_01_on.jpg');
HpbImgPreload('_hpb_rollover8', 'images/top_banner_02.jpg', 'images/top_banner_02_on.jpg');
HpbImgPreload('_hpb_rollover9', 'images/top_banner_03.jpg', 'images/top_banner_03_on.jpg');
HpbImgPreload('_hpb_rollover10', 'images/top_banner_04.jpg', 'images/top_banner_04_on.jpg');
HpbImgPreload('_hpb_rollover1', 'images/menu_01.jpg', 'images/menu_01_on.jpg');
HpbImgPreload('_hpb_rollover2', 'images/menu_02.jpg', 'images/menu_02_on.jpg');
HpbImgPreload('_hpb_rollover3', 'images/menu_03.jpg', 'images/menu_03_on.jpg');
HpbImgPreload('_hpb_rollover4', 'images/menu_04.jpg', 'images/menu_04_on.jpg');
HpbImgPreload('_hpb_rollover5', 'images/menu_05.jpg', 'images/menu_05_on.jpg');
HpbImgPreload('_hpb_rollover6', 'images/menu_06.jpg', 'images/menu_06_on.jpg');
HpbImgPreload('_HPB_ROLLOVER11', 'images/pagetop.gif', 'images/pagetop_on.gif');