text: jQuery(function() {
      var $ = jQuery,    // just in case. Make sure it's not an other libaray.
  
          $wrap = $('#uploader'),
  
          // 图片容器
          $queue = $('<ul class="filelist"></ul>')
              .appendTo( $wrap.find('.queueList') ),
  
          // 状态栏，包括进度和控制按钮
          $statusBar = $wrap.find('.statusBar'),
  
          // 文件总体选择信息。
          $info = $statusBar.find('.info'),
  
          // 上传按钮
          $upload = $wrap.find('.uploadBtn'),
  
          // 没选择文件之前的内容。
          $placeHolder = $wrap.find('.placeholder'),
  
          // 总体进度条
          $progress = $statusBar.find('.progress').hide(),
  
          // 添加的文件数量
          fileCount = 1,
  
          // 添加的文件总大小
          fileSize = 0,
  
          // 优化retina, 在retina下这个值是2
          ratio = window.devicePixelRatio || 1,
  
          // 缩略图大小
          thumbnailWidth = 110 * ratio,
          thumbnailHeight = 110 * ratio,
  
          // 可能有pedding, ready, uploading, confirm, done.
          state = 'pedding',
  
          // 所有文件的进度信息，key为file id
          percentages = {},
  
          supportTransition = (function(){
              var s = document.createElement('p').style,
                  r = 'transition' in s ||
                        'WebkitTransition' in s ||
                        'MozTransition' in s ||
                        'msTransition' in s ||
                        'OTransition' in s;
              s = null;
              return r;
          })(),
  
          // WebUploader实例
          uploader;
  
      if ( !WebUploader.Uploader.support() ) {
          alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
          throw new Error( 'WebUploader does not support the browser you are using.' );
      }
  
      // 实例化
      uploader = WebUploader.create({
          pick: {
              id: '#filePicker',
              label: '点击选择图片'
          },
          dnd: '#uploader .queueList',
          paste: document.body,
  
          // swf文件路径
          swf: BASE_URL + '/Uploader.swf',
  
          disableGlobalDnd: true,
  
          chunked: true,
          // server: 'http://webuploader.duapp.com/server/fileupload.php',
          server: 'http://2betop.net/fileupload.php',
          fileNumLimit: 300,
          fileSizeLimit: 5 * 1024 * 1024,    // 200 M
          fileSingleSizeLimit: 1 * 1024 * 1024    // 50 M
      });
  
      // 添加“添加文件”的按钮，
      uploader.addButton({
          id: '#filePicker2',
          label: '继续添加'
      });
  
      // 当有文件添加进来时执行，负责view的创建
      function addFile( file ) {
          var $li = $( '<li id="' + file.id + '">' +
                  '<p class="title">' + file.name + '</p>' +
                  '<p class="imgWrap"></p>'+
                  '<p class="progress"><span></span></p>' +
                  '</li>' ),
  
              $btns = $('<div class="file-panel">' +
                  '<span class="cancel">删除</span>' +
                  '<span class="rotateRight">向右旋转</span>' +
                  '<span class="rotateLeft">向左旋转</span></div>').appendTo( $li ),
              $prgress = $li.find('p.progress span'),
              $wrap = $li.find( 'p.imgWrap' ),
              $info = $('<p class="error"></p>'),
  
              showError = function( code ) {
                  switch( code ) {
                      case 'exceed_size':
                          text = '文件大小超出';
                          break;
  
                      case 'interrupt':
                          text = '上传暂停';
                          break;
  
                      default:
                          text = '上传失败，请重试';
                          break;
                  }
  
                  $info.text( text ).appendTo( $li );
              };
  
          if ( file.getStatus() === 'invalid' ) {
              showError( file.statusText );
          } else {
              // @todo lazyload
              $wrap.text( '预览中' );
              uploader.makeThumb( file, function( error, src ) {
                  if ( error ) {
                      $wrap.text( '不能预览' );
                      return;
                  }
  
                  var img = $('<img src="'+src+'">');
                  $wrap.empty().append( img );
              }, thumbnailWidth, thumbnailHeight );
  
              percentages[ file.id ] = [ file.size, 0 ];
              file.rotation = 0;
          }
  
          file.on('statuschange', function( cur, prev ) {
              if ( prev === 'progress' ) {
                  $prgress.hide().width(0);
              } else if ( prev === 'queued' ) {
                  $li.off( 'mouseenter mouseleave' );
                  $btns.remove();
              }
  
              // 成功
              if ( cur === 'error' || cur === 'invalid' ) {
                  console.log( file.statusText );
                  showError( file.statusText );
                  percentages[ file.id ][ 1 ] = 1;
              } else if ( cur === 'interrupt' ) {
                  showError( 'interrupt' );
              } else if ( cur === 'queued' ) {
                  percentages[ file.id ][ 1 ] = 0;
              } else if ( cur === 'progress' ) {
                  $info.remove();
                  $prgress.css('display', 'block');
              } else if ( cur === 'complete' ) {
                  $li.append( '<span class="success"></span>' );
              }
  
              $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
          });
  
          $li.on( 'mouseenter', function() {
              $btns.stop().animate({height: 30});
          });
  
          $li.on( 'mouseleave', function() {
              $btns.stop().animate({height: 0});
          });
  
          $btns.on( 'click', 'span', function() {
              var index = $(this).index(),
                  deg;
  
              switch ( index ) {
                  case 0:
                      uploader.removeFile( file );
                      return;
  
                  case 1:
                      file.rotation += 90;
                      break;
  
                  case 2:
                      file.rotation -= 90;
                      break;
              }
  
              if ( supportTransition ) {
                  deg = 'rotate(' + file.rotation + 'deg)';
                  $wrap.css({
                      '-webkit-transform': deg,
                      '-mos-transform': deg,
                      '-o-transform': deg,
                      'transform': deg
                  });
              } else {
                  $wrap.css( 'filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ (~~((file.rotation/90)%4 + 4)%4) +')');
                  // use jquery animate to rotation
                  // $({
                  //     rotation: rotation
                  // }).animate({
                  //     rotation: file.rotation
                  // }, {
                  //     easing: 'linear',
                  //     step: function( now ) {
                  //         now = now * Math.PI / 180;
  
                  //         var cos = Math.cos( now ),
                  //             sin = Math.sin( now );
  
                  //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
                  //     }
                  // });
              }
  
  
          });
  
          $li.appendTo( $queue );
      }
  
      // 负责view的销毁
      function removeFile( file ) {
          var $li = $('#'+file.id);
  
          delete percentages[ file.id ];
          updateTotalProgress();
          $li.off().find('.file-panel').off().end().remove();
      }
  
      function updateTotalProgress() {
          var loaded = 0,
              total = 0,
              spans = $progress.children(),
              percent;
  
          $.each( percentages, function( k, v ) {
              total += v[ 0 ];
              loaded += v[ 0 ] * v[ 1 ];
          } );
  
          percent = total ? loaded / total : 0;
  
          spans.eq( 0 ).text( Math.round( percent * 100 ) + '%' );
          spans.eq( 1 ).css( 'width', Math.round( percent * 100 ) + '%' );
          updateStatus();
      }
  
      function updateStatus() {
          var text = '', stats;
  
          if ( state === 'ready' ) {
              text = '选中' + fileCount + '张图片，共' +
                      WebUploader.formatSize( fileSize ) + '。';
          } else if ( state === 'confirm' ) {
              stats = uploader.getStats();
              if ( stats.uploadFailNum ) {
                  text = '已成功上传' + stats.successNum+ '张照片至XX相册，'+
                      stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
              }
  
          } else {
              stats = uploader.getStats();
              text = '共' + fileCount + '张（' +
                      WebUploader.formatSize( fileSize )  +
                      '），已上传' + stats.successNum + '张';
  
              if ( stats.uploadFailNum ) {
                  text += '，失败' + stats.uploadFailNum + '张';
              }
          }
  
          $info.html( text );
      }
  
      function setState( val ) {
          var file, stats;
  
          if ( val === state ) {
              return;
          }
  
          $upload.removeClass( 'state-' + state );
          $upload.addClass( 'state-' + val );
          state = val;
  
          switch ( state ) {
              case 'pedding':
                  $placeHolder.removeClass( 'element-invisible' );
                  $queue.parent().removeClass('filled');
                  $queue.hide();
                  $statusBar.addClass( 'element-invisible' );
                  uploader.refresh();
                  break;
  
              case 'ready':
                  $placeHolder.addClass( 'element-invisible' );
                  $( '#filePicker2' ).removeClass( 'element-invisible');
                  $queue.parent().addClass('filled');
                  $queue.show();
                  $statusBar.removeClass('element-invisible');
                  uploader.refresh();
                  break;
  
              case 'uploading':
                  $( '#filePicker2' ).addClass( 'element-invisible' );
                  $progress.show();
                  $upload.text( '暂停上传' );
                  break;
  
              case 'paused':
                  $progress.show();
                  $upload.text( '继续上传' );
                  break;
  
              case 'confirm':
                  $progress.hide();
                  $upload.text( '开始上传' ).addClass( 'disabled' );
  
                  stats = uploader.getStats();
                  if ( stats.successNum && !stats.uploadFailNum ) {
                      setState( 'finish' );
                      return;
                  }
                  break;
              case 'finish':
                  stats = uploader.getStats();
                  if ( stats.successNum ) {
                      alert( '上传成功' );
                  } else {
                      // 没有成功的图片，重设
                      state = 'done';
                      location.reload();
                  }
                  break;
          }
  
          updateStatus();
      }
  
      uploader.onUploadProgress = function( file, percentage ) {
          var $li = $('#'+file.id),
              $percent = $li.find('.progress span');
  
          $percent.css( 'width', percentage * 100 + '%' );
          percentages[ file.id ][ 1 ] = percentage;
          updateTotalProgress();
      };
  
      uploader.onFileQueued = function( file ) {
          fileCount++;
          fileSize += file.size;
  
          if ( fileCount === 1 ) {
              $placeHolder.addClass( 'element-invisible' );
              $statusBar.show();
          }
  
          addFile( file );
          setState( 'ready' );
          updateTotalProgress();
      };
  
      uploader.onFileDequeued = function( file ) {
          fileCount--;
          fileSize -= file.size;
  
          if ( !fileCount ) {
              setState( 'pedding' );
          }
  
          removeFile( file );
          updateTotalProgress();
  
      };
  
      uploader.on( 'all', function( type ) {
          var stats;
          switch( type ) {
              case 'uploadFinished':
                  setState( 'confirm' );
                  break;
  
              case 'startUpload':
                  setState( 'uploading' );
                  break;
  
              case 'stopUpload':
                  setState( 'paused' );
                  break;
  
          }
      });
  
      uploader.onError = function( code ) {
          alert( 'Eroor: ' + code );
      };
  
      $upload.on('click', function() {
          if ( $(this).hasClass( 'disabled' ) ) {
              return false;
          }
  
          if ( state === 'ready' ) {
              uploader.upload();
          } else if ( state === 'paused' ) {
              uploader.upload();
          } else if ( state === 'uploading' ) {
              uploader.stop();
          }
      });
  
      $info.on( 'click', '.retry', function() {
          uploader.retry();
      } );
  
      $info.on( 'click', '.ignore', function() {
          alert( 'todo' );
      } );
  
      $upload.addClass( 'state-' + state );
      updateTotalProgress();
  });
  