html动态添加上传文件控件

Html代码 

// 隐藏的，用来动态增加控件时复制用的 

<p id="pFileHidden" style="display:none;"> 

                                  <html-el:file property="upload_picture_hidden" styleId="upload_picture_hidden" style="width: 500px;" /> 

                                  <img src="${ctx}/styles/admin/images/x.gif" style="vertical-align:middle; cursor:pointer;" id="imgDelTr" /></p> 

// 显示的+按钮，该按钮用来动态增加HTML控件 

<p id="pFile"> 

                                  <html-el:file property="up_picture" styleId="upload_picture" style="width: 500px;" /> 

                                  <img src="${ctx}/styles/admin/images/+.gif" style="vertical-align:middle; cursor:pointer;" id="imgAddTr" /></p> 

Javascript代码 

// +按钮的javascript代码 

        $("#imgAddTr").click(function (){ 

            $("#pFileHidden").clone().find("#upload_picture_hidden").attr("name", "up_" + new Date().getTime()).end().appendTo($("#pFile")).show(); 

            $("img[id='imgDelTr']").each(function(){ 

                $(this).click(function (){ 

                    $(this).parent().remove(); 

                }); 

            }); 

        });