ajax图片上传，图片异步上传，更新实例

/// <reference path="jquery-1.8.3.js" /> 
/// <reference path="ajaxForm/jquery.form.js" /> 
 
/! 
  jQuery upload 
  用于上传单个文件，上传成功后,返回文件路径。 
  本插件依赖jQuery，jquery.form 请在使用时引入依赖的文件 
  
  Date: 2014/4/23 
 / 
/ 
<div style="width: 100%; float: left;"> 
 <input type="hidden" id="hfThumbnail" value="/uploads/2014/04/23/635338686611432716.jpg" /> 
 <div class="imgdiv"></div> 
 <span class="img_span"> 
 <input type="file" name="file" /> 
 </span> 
 
 <input type="button" value="上传" class="upload" /> 
</div> 
<div style="width: 100%; float: left;"> 
 <input type="hidden" id="hfThumbnail" value="/uploads/2014/04/23/635338686611432716.jpg" /> 
 <div class="imgdiv"></div> 
 <span class="img_span"> 
 <input type="file" name="file" /> 
 </span> 
 <input type="button" value="上传" class="upload" /> 
</div> 

$(document).ready(function () { 
 
 //$(".upload").upload({ 
 // uploadData: { id: "12233" }, 
 // suessFn: function (response, statusText, xhr, $this) { 
 // alert(response.Data.RelativePath) 
 // }, 
 // deleteData: { id: function () { return "asdfasdf" } } 
 /