<div class="form-item" id="file-demo-wrapper">
<label for="file-demo">请选择文件:www.gimoo.net </label>
<input type="file" name="files[file-demo]" class="form-file" id="file-demo" size="40" />
</div>




$("#file-demo").remove();
//http://www.gimoo.net
$("<input type="file" name="files[file-demo]" class="form-file" id="file-demo" size="40" />").appendTo("#file-demo-wrapper");