js实现带进度条提示的多视频上传功能

 <link rel="stylesheet" href="bootstrap.css" rel="external nofollow" >
 <script src="jquery.fileupload.js"></script>
 <script src="http://malsup.github.com/jquery.form.js"></script>

<div class="form-group">
      <label>产品视频：</label>
      <div class="videoupfile">
        <input type="file" name="avatarvideo" class="avatarvideo"><a class="btn deleteavatarvideo" href="javascript:;" rel="external nofollow" rel="external nofollow" >删除</a>
        <div class="videomaterials">
          <div class="progress">
            <div class="progress-bar progress-bar-success progress-bar-striped" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
              <span class="sr-only">0% complete</span>
            </div>
          </div>
          <div class="files"></div>
          <div class="showimg"></div>
          <input type="hidden" value="" name="video_id[]">
          <p style="color: #b92c28" class="img_upload_info"></p>
        </div>
      </div>
      <div class="videoupfile">
        <input type="file" name="avatarvideo" class="avatarvideo"><a class="btn deleteavatarvideo" href="javascript:;" rel="external nofollow" rel="external nofollow" >删除</a>
        <div class="videomaterials">
          <div class="progress">
            <div class="progress-bar progress-bar-success progress-bar-striped" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
              <span class="sr-only">0% complete</span>
            </div>
          </div>
          <div class="files"></div>
          <div class="showimg"></div>
          <input type="hidden" value="" name="video_id[]">
          <p style="color: #b92c28" class="img_upload_info"></p>
        </div>
      </div>
</div>

//上传视频

$(".avatarvideo").change(function() {
  var _this = $(this);
  _this.wrap("<form class='fileuploadevideo' action='/admin/uploadimg/addvideo' method='post' enctype='multipart/form-data'></form>");
  _this.parents('.fileuploadevideo').ajaxsubmit({
    datatype: 'json',
    beforesend: function () {
      $(".progress").show();
    },
    uploadprogress: function (event, position, total, percentcomplete) {
      var percentval = percentcomplete + '%';
      _this.parents('.videoupfile').find(".progress-bar").width(percentcomplete + '%');
      _this.parents('.videoupfile').find(".progress-bar").html(percentval);
      _this.parents('.videoupfile').find(".sr-only").html(percentcomplete + '%');
    },
    success: function (data) {
      if(data.code==100) {
        _this.parents('.videoupfile').find(".files").html("文件名: " + data.video_title);
        _this.parents('.videoupfile').find("input[type=hidden]").val(data.video_id);
        alert("上传成功!");
      }else{
        alert("上传失败");
      }
    },
    error: function () {
      alert("上传失败");
    }
  });