$(function() {
                $('#dodaj').click(function(){
                    if (document.getElementById("inputNewsletter").value!="") {
                    $.ajax({
                        type: "POST",
                        url: "../libs/php/newsletter_post.php",
                        data: "email="+$("#inputNewsletter").val()+"&onPage="+"1"+"&add="+true,
                        success: function(html) {
                            //document.getElementById("inputNewsletter").value = "";
                            alert(html);
                        }});
                    } else {alert("Musisz podać adres email.");};

                })
    })

$(function() {
                $('#usun').click(function(){
                    if (document.getElementById("inputNewsletter").value!="") {
                    $.ajax({
                        type: "POST",
                        url: "../libs/php/newsletter_post.php",
                        data: "email="+$("#inputNewsletter").val()+"&onPage="+"1",
                        success: function(html) {
                            //document.getElementById("inputNewsletter").value = "";
                            alert(html);
                        }});
                    } else {alert("Musisz podać adres email.");};

                })
    })