<div class="form-item" id="file-demo-wrapper"> <br><label for="file-demo">请选择文件:www.jb51.net </label> <br><input type="file" name="files[file-demo]" class="form-file" id="file-demo" size="40"><br> </div> <br><br><br><br>$("#file-demo").remove(); <br>// <br>$("<input type='\"file\"' name='\"files[file-demo]\"' class='\"form-file\"' id='\"file-demo\"' size='\"40\"'>").appendTo("#file-demo-wrapper"); <br><br>