[рони]

Artem_A,

$(function() {
    function create(button) {
        var $add_button = $('<button type="button" name="button" class=" add-button" >Добавить платеж</button>');
        var $confirmed_pay = $('<div class="confirmed-pay"> <a href="#"><span class="icons close-icon close-pay"></span></a><p class="blue-text">10 000</p><p>Экономия 25 000</p></div>');
        return button ? $add_button : $confirmed_pay
    }
    $(".change-block").append(create(true)).on("click",
        ".add-button, .close-pay",
        function(event) {
            var button = $(this).is(".close-pay");
            var elem = create(button);
            $(event.delegateTarget).html(elem)
        })
});