类似163附件上传的JS

<script language="javascript">
      var i = 0;
      var maxTime = 10;//最大次数
      function addFile() {   
		   if(i < maxTime){
		        i++;
			    var fileDiv = document.all['fileDiv'];
			    var strHtml = '<span><input type="file"><button onclick="removeFile(parentNode);">删除</button><br></span>';
			    fileDiv.innerHTML += strHtml;
		   }else{
				alert("对不起，最多只能上传10个附件");
		   }  
      }
      
      function removeFile(obj) {
	       i -- ;
		   alert(i);
           obj.removeNode(true);
      }
</script>
<form enctype="multipart/form-data">
      <a href="javascript:void(addFile());" class="file">添加附件</a>
	  <div id="fileDiv"></div>
</form>