function leerCookie(nombre) {
    var i;
    var a = document.cookie.split(";")
    var n, v;
    var pos;
    for (i=0; i<a.length; i++) {
        pos = a[i].indexOf("=");
        n = a[i].substring(0, pos);
        if (n == nombre) {
        return unescape(a[i].substring(1 + pos, a[i].length));
        }
    }
    return null;
}



function hasCookie(name) {
    var galleta = leerCookie(name);
    
    if(galleta == null)
    {
        return false;
    }
    else 
    {
        return true;
    }
}