/** Lettura dei cookie */
function getCookie (name)
{
	var start = document.cookie.indexOf (name + "=");
	var len = start + name.length + 1;
	if (( ! start) && (name != document.cookie.substring (0, name.length))) return null;
	if (start == - 1) return null;
	var end = document.cookie.indexOf (";", len);
	if (end == - 1) end = document.cookie.length;
	return unescape (document.cookie.substring (len, end));
}
function getCookieValue (cookie, paramname)
{
	var cookieValue = getCookie (cookie);
	if (cookieValue == null)
		return null;
	paramname = paramname + "=";
	start = cookieValue.indexOf (paramname);
	app = cookieValue.substring (start);
	if (start > 0)
	{
		end = app.indexOf (":");
		if (end > 0)
		{
			len = end - app.indexOf (paramname);
			return app.substring (app.indexOf (paramname) + 2, len);
		} 
		else
		{
			return app.substring (app.indexOf (paramname) + 2);
		}
	} else 
	{
		return null;
	}
}