function readCookie (name)
{
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
}

function testPreHome (portal,euskara,castellano,english)
{
	var cookieValue = readCookie ("ehuPortalCookie");
	if (cookieValue != null)
	{
		// Hay cookie. Vamos a ver si es de los idiomas autorizados.
		if ((cookieValue == "es") && (castellano != ""))
		{
			location.href="/"+portal+"-"+castellano+"/"+cookieValue;
		}
		else if ((cookieValue == "eu") && (euskara != ""))
		{
			location.href="/"+portal+"-"+euskara+"/"+cookieValue;
		}
		else if ((cookieValue == "en") && (english != ""))
		{
			location.href="/"+portal+"-"+english+"/"+cookieValue;
		}
	}
}