function getWHCookieHeight(wh)
{

  if (wh == null) return null;
  var a = "H=";
  var s = wh.indexOf(a);
  if (s < 0) return null;
  var e = wh.indexOf("&", s+2);
  if (e < 0) {                         
    e = wh.indexOf(";", s+2);
  }
  if (e < 0) return null;
  return wh.substring(s, e);

}

function getWHCookieWidth(wh)
{

  if (wh == null) return null;
  var a = "W=";
  var s = wh.indexOf(a);
  if (s < 0) return null;
  var e = wh.indexOf("&", s+2);
  if (e < 0) {                         
    e = wh.indexOf(";", s+2);
  }
  if (e < 0) return null;
  return wh.substring(s, e);

}

function setWHCookie(domain, path) 
{

  var wh = getCookieByName("WH");

  var cookiedh = getWHCookieHeight(wh);
  var cookiedw = getWHCookieWidth(wh);

  var currh = document.body.offsetHeight;
  var currw = document.body.offsetWidth;

  var dowh = false;

  if ((currh != cookiedh || currw != cookiedw) && (currh != null && currw != null)) {
    dowh = true; 
  }

  if (dowh) {

    wh = "WH=" + "W=" + currw + "&" + "H=" + currh ;
    wh += (path? ("; path=" + path) : "");
    wh += (domain? ("; domain=" + domain) : "");
    document.cookie = wh;

  }

}

function dowhcookie()
{

  var ap = window.navigator.appVersion.toLowerCase();
  var i = ap.indexOf("msie");

  if (ap.indexOf("windows") >= 0 && i >= 0 && ((i + 5) < ap.length)) {

    var v = ap.charAt(i + 5);

    if (v >= 5 ) {
      setWHCookie("shinurayasu-navi.com", "/");
    }

  }

}

dowhcookie();