Question

I want append link add in last child of class:(('.' + change_class + ':last .adda .mediumCell:first')) after remove, but if you remove last chil (44444444444444444444), it not append in last child mean 3333333333333333333 and remove with same row, how can fix it?

Example from my code: http://jsfiddle.net/LX49c/1/

$('.remove').live('click',function (e) {
    e.preventDefault();

    var change_class = $(this).closest('.find_input').find('div').attr('class').split(" ")[0];
    var url = $(this).closest('.find_input').find('div').attr('class').split(" ")[1];
    var get_class = $(this).closest('.' + change_class).attr('id');
            $('#' + get_class).fadeOut('slow', function () {
                $(this).remove();
            });
            $('.' + change_class + ':last .adda .mediumCell:first').append('<a href="" class="add_input">add</a>'); 
});

Answer 1

Move the append(...) to within the .fadeOut function. See http://jsfiddle.net/LX49c/2/

$('.remove').live('click',function (e) {
    e.preventDefault();

    var change_class = $(this).closest('.find_input').find('div').attr('class').split(" ")[0];
    var url = $(this).closest('.find_input').find('div').attr('class').split(" ")[1];
    var get_class = $(this).closest('.' + change_class).attr('id');
            $('#' + get_class).fadeOut('slow', function () {
                $(this).remove();
                $('.' + change_class + ':last .adda .mediumCell:first').append('<a href="" class="add_input">add</a>');
            });
            //Moved from here
});

An alternative method is to remove the class before appending: http://jsfiddle.net/LX49c/4/

....
var get_class = $(this).closest('.' + change_class).attr('id');
        $('#' + get_class).fadeOut('slow', function () {
            $(this).remove();
        });
        $("#" + get_class).removeClass(change_class);
        $('.' + change_class + ':last(-1) .adda .mediumCell:first').append('<a href="" class="add_input">add</a>'); 

---

You’re doing multiple expensive JQuery calls. I’d suggest replacing the following code:

var change_class = $(this).closest('.find_input').find('div').attr('class').split(" ")[0];
var url = $(this).closest('.find_input').find('div').attr('class').split(" ")[1];
//Replace the previous by:
var className = $(this).closest('.find_input').find('div').attr('class').split(" ");
var change_class = className[0];
var url = className[1];