function setCookie (cookieName, cookieValue, expiry) 
{
	var expDate = new Date();

	if(expiry) {
		expDate.setTime (expDate.getTime() + expiry);
	    document.cookie = cookieName + "=" + escape (cookieValue) + "; expires=" + expDate.toGMTString();
    } else {
        document.cookie = cookieName + "=" + escape (cookieValue);
	}
}

function readCookie (CookieName) {
  var CookieString = document.cookie;
  var CookieSet = CookieString.split (';');
  var SetSize = CookieSet.length;
  var CookiePieces
  var ReturnValue = "";
  var x = 0;

  for (x = 0; ((x < SetSize) && (ReturnValue == "")); x++) {

    CookiePieces = CookieSet[x].split ('=');

    if (CookiePieces[0].substring (0,1) == ' ') {
      CookiePieces[0] = CookiePieces[0].substring (1, CookiePieces[0].length);
    }

    if (CookiePieces[0] == CookieName) {
      ReturnValue = CookiePieces[1];
    }

  }

  return ReturnValue;

}