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

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

function JsImgSwap(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 = JsImgFind(document, imgName);
      if (img) img.src = imgSrc;
    }
  }
}


function JsPreLoad()
{
 var swImg; swImg=new Array;
 
// JsImgPreload('_Js_ROLLOVER0', 'images/top1.png', 'images/top2.png');
 JsImgPreload('_Js_ROLLOVER0', 'images/top1.jpg', 'images/top2.png');
 JsImgPreload('_Js_ROLLOVER1', 'images/top_s.gif', 'images/top.gif');
 JsImgPreload('_Js_ROLLOVER2', 'images/profile_s.gif', 'images/profile.gif');
 JsImgPreload('_Js_ROLLOVER3', 'images/photo_s.gif', 'images/photo.gif');
 JsImgPreload('_Js_ROLLOVER4', 'images/music_s.gif', 'images/music.gif');
 JsImgPreload('_Js_ROLLOVER5', 'images/movie_s.gif', 'images/movie.gif');
 JsImgPreload('_Js_ROLLOVER6', 'images/download_s.gif', 'images/download.gif');
 JsImgPreload('_Js_ROLLOVER7', 'images/mail_s.gif', 'images/mail.gif');
 JsImgPreload('_Js_ROLLOVER8', 'images/biography_s.gif', 'images/biography.gif');
 JsImgPreload('_Js_ROLLOVER9', 'images/discography_s.gif', 'images/discography.gif');
 JsImgPreload('_Js_ROLLOVER10', 'images/shop_s.gif', 'images/shop.gif');
}