function HpbImgPreload()
{
  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 = 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];
      }
    }
  }
}
// HpbImgSwap: 画像を入れ換えます
//
function HpbImgSwap(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)
    {
      document.images[imgName].src = imgSrc;
    }
  }
}
var swImg; swImg=new Array;
HpbImgPreload('_HPB_ROLLOVER1', './img/profile.jpg', './img/profile-onmouse.jpg');
HpbImgPreload('_HPB_ROLLOVER2', './img/blog.jpg', './img/blog-onmouse.jpg');
HpbImgPreload('_HPB_ROLLOVER3', './img/gallery.jpg', './img/gallery-onmouse.jpg');
HpbImgPreload('_HPB_ROLLOVER4', './img/bbs.jpg', './img/bbs-onmouse.jpg');
HpbImgPreload('_HPB_ROLLOVER5', './img/linx.jpg', './img/linx-onmouse.jpg');
HpbImgPreload('_HPB_ROLLOVER6', './img/form.jpg', './img/form-onmouse.jpg');
HpbImgPreload('_HPB_ROLLOVER7', '../img/top.jpg', '../img/top-onmouse.jpg');