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];
      }
    }
  }
}
//  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('ranking_button1', 'http://blog-parts.info/images/ranking_with2_1.gif', 'http://blog-parts.info/images/ranking_with2_2.gif');
HpbImgPreload('ranking_button2', 'http://blog-parts.info/images/ranking_fc2_1.gif', 'http://blog-parts.info/images/ranking_fc2_2.gif');
HpbImgPreload('ranking_button3', 'http://blog-parts.info/images/ranking_blogmura_1.gif', 'http://blog-parts.info/images/ranking_blogmura_2.gif');
HpbImgPreload('ranking_button4', 'http://blog-parts.info/images/ranking_ranq_1.gif', 'http://blog-parts.info/images/ranking_ranq_2.gif');
HpbImgPreload('ranking_button5', 'http://blog-parts.info/images/ranking_kutsulog_1.gif', 'http://blog-parts.info/images/ranking_kutsulog_2.gif');
HpbImgPreload('ranking_button6', 'http://blog-parts.info/images/ranking_dendou_1.gif', 'http://blog-parts.info/images/ranking_dendou_2.gif');