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];
      }
    }
  }
}

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;
}

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_ROLLOVER1', 'img/top/loginbutton.jpg', 'img/top/loginbutton_over.jpg');
HpbImgPreload('_HPB_ROLLOVER2', 'img/top/topmenu_m_1.gif', 'img/top/topmenu_m_1_over.gif');
HpbImgPreload('_HPB_ROLLOVER3', 'img/top/topmenu_m_3.gif', 'img/top/topmenu_m_3_over.gif');
HpbImgPreload('_HPB_ROLLOVER4', 'img/top/topmenu_m_4.gif', 'img/top/topmenu_m_4_over.gif');
HpbImgPreload('_HPB_ROLLOVER5', 'img/top/topmenu_m_5.gif', 'img/top/topmenu_m_5_over.gif');
HpbImgPreload('_HPB_ROLLOVER6', 'img/top/topmenu_m_6.gif', 'img/top/topmenu_m_6_over.gif');
HpbImgPreload('_HPB_ROLLOVER8', 'img/info/info_menu1.gif', 'img/info/info_menu1_over.gif');
HpbImgPreload('_HPB_ROLLOVER9', 'img/info/info_menu2.gif', 'img/info/info_menu2_over.gif');
HpbImgPreload('_HPB_ROLLOVER10', 'img/info/info_menu3.gif', 'img/info/info_menu3_over.gif');
HpbImgPreload('_HPB_ROLLOVER11', 'img/info/info_menu4.gif', 'img/info/info_menu4_over.gif');
HpbImgPreload('_HPB_ROLLOVER12', 'img/info/info_menu5.gif', 'img/info/info_menu5_over.gif');
HpbImgPreload('_HPB_ROLLOVER7', 'img/top/topmenu_t_2.jpg', 'img/top/topmenu_t_2_over.jpg');
HpbImgPreload('_HPB_ROLLOVER13', 'img/top/search.gif', 'img/top/search_over.gif');