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

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

function imgSwap(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 = imgFind(document, imgName);
      if (img) img.src = imgSrc;
    }
  }
}
var swImg; swImg=new Array;

var _agent = navigator.userAgent.toLowerCase();



var _win = (_agent.indexOf('win') != -1);

var _mac = (_agent.indexOf('mac') != -1);



var _major = parseInt(navigator.appVersion);

var _minor = parseFloat(navigator.appVersion);



var _ns    = ((_agent.indexOf('mozilla') != -1) && (_agent.indexOf('compatible') == -1));

var _ns2   = (_ns && (_major == 2));

var _ns3   = (_ns && (_major == 3));

var _ns4   = (_ns && (_major == 4));

var _ns4up = (_ns && (_major >= 4));

var _nav   = (_ns && ((_agent.indexOf(';nav') != -1) || (_agent.indexOf('; nav') != -1)));

var _ns6   = (_ns && (_major == 5));

var _ns61  = (_ns6 && (_agent.indexOf('netscape6/6.1') != -1));

var _ns62  = (_ns6 && (_agent.indexOf('netscape6/6.2') != -1));



var _ie    = (_agent.indexOf('msie') != -1);

var _ie3   = (_ie && (_major < 4));

var _ie4   = (_ie && (_major == 4) && (_agent.indexOf('msie 5') == -1));

var _ie4up = (_ie && (_major >= 4));

var _ie45  = (_ie && (_minor == 4.5));

var _ie5   = (_ie && (_major == 4) && (_agent.indexOf('msie 5') != -1));

var _ie5up = (_ie && !_ie3 && !_ie4);

var _ie6   = (_ie && (_major == 4) && (_agent.indexOf('msie 6') != -1));