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                <button id="ekle_on">Liste ekle</button>
<ul id="liste_on">
  <li><a href="#">Satır 1</a></li>
  <li><a href="#">Satır 2</a></li>
  <li><a href="#">Satır 3</a></li>


                #area_product {
  position: relative;
  width: 600px;
  height: 200px;
  border-bottom: 1px solid green;
  border: 1px solid green;
  margin-bottom: 5px;
  padding: 10px;
  clear: both;


                $(document).ready(function() {

  //butona basınca olay tetikleniyor
  $('#ekle_on').click(function() {

    //Son "li" elamanının index değeri alınıyor
    var son = $('#liste_on li:last').index();

    //Yeni liste elemanının en sona ekliyoruz
    $('#liste_on').append('<li><a href="#">Satır ' + (son + 2) + '</a></li>');

  //on() yapısı ile #liste_on id'li nesnenin li a nesnesi
  //click olayıyla ilişkilendiriliyor
  $('#liste_on').on("click", "li a", function() {
    alert($(this).text() + " Tıklandı");