多文件上传

function addFile() {
           var fileDiv = document.all['fileDiv'];
           var strHtml = '<span><input type="file">&nbsp;&nbsp;<button onclick="removeFile(parentNode);">删除</button><br></span>';
           fileDiv.innerHTML += strHtml;
      }

      function removeFile(obj) {
           obj.removeNode(true);
      }
</script>
<form enctype="multipart/form-data">
      <div id="fileDiv"></div>
      <a href="javascript:void(addFile());" class="file">添加附件</a>
</form>