//リンク画像の切り替え

function ChangeIMG(id,img) {
	if (document.getElementById || document.all || document.layers) {
		document.images[id].src = img;
	}
}

function NNCheck(version) {
  if ((navigator.appName.indexOf("Netscape") >= 0) && (version <= parseInt(navigator.appVersion.substring(0, 3)))) {
    return true;
  } else {
    return false;
  }
}

function IECheck(version) {
  if ((navigator.appName.indexOf("Microsoft Internet Explorer") >= 0) && (version <= parseInt(navigator.appVersion.substring(22, 25)))) {
    return true;
  } else {
    return false;
  }
}