<script>

            $(function() {

                //增加上传

                var addli = function() {

                    var linum = parseInt($(".pic-wrap li.upload").length);

                    $('.pic-wrap ul').append('<li class="upload"><input name="FileUpload' + (linum + 1) + '" type="file" id="FileUpload' + (linum + 1) + '" class="multi"/>图片名称:<input type="text" class="text2" id="ImgTitle' + (linum + 1) + '" name="ImgTitle' + (linum + 1) + '"/>');

                };

                //增加“添加”按钮并清除原来的

                var move_btn = function() {

                    $(".pic-wrap li.upload:last").append('<input class="add_up" type="button" value="添加" />')

                .find('.add_up').bind('click', function() {

                    addli();

                    move_btn();

                    move_btn2();

                })

                .parent('li.upload').siblings().find('.add_up').remove();

                };

                //移动“上传”按钮到最后

                var move_btn2 = function() {

                    $('.upbtn').insertAfter(".pic-wrap li.upload:last")

                };

                $('.add_up').click(function() {

                    addli();

                    move_btn();

                    move_btn2();

                });

            });

</script>

                       <ul>

                                     <li class="upload">

                                     <input id="File1" name="FileUpload1" type="file" class="multi"/>产品名称:

                                     <input type="text" class="text2" id="ImgTitle1" name="ImgTitle1"/>

                                     <input class="add_up" type="button" value="添加" />

                                     <input type="hidden" id="fileSize"  name="fileSize" value="1"/>

                                     </li>

                               </ul>