function clearNewsletter() {
    if (document.getElementById("inputNewsletter").value == "podaj adres e-mail") {
		document.getElementById("inputNewsletter").value = "";
    }
}

function fillNewsletter() {
    if (document.getElementById("inputNewsletter").value == "") {
		document.getElementById("inputNewsletter").value = "podaj adres e-mail";
    }
}