text: function dropFileUpload(obj) {
    var not_upload_file = false;
  
    $("img.library_index").mousedown(function(event) {
      not_upload_file = true;
    });
    $("img.library_index").mouseup(function(event) {
      not_upload_file = false;
    });
  
    obj.on('dragenter', function (e) {
      if (!not_upload_file) {
        $(this).addClass("drag");
      }
      e.stopPropagation();
      e.preventDefault();
    });
  
    obj.on('dragleave', function (e) {
      $(this).removeClass("drag");
    })
  
    obj.on('dragover', function (e) {
      if (!not_upload_file) {
        $(this).addClass("drag");
      }
      e.stopPropagation();
      e.preventDefault();
    });
  
    obj.on('drop', function (e) {
      if (!not_upload_file) {
        e.preventDefault();
        AntsAdmin.uploadFiles = e.originalEvent.dataTransfer.files;
  
        var reader = new FileReader();
        reader.onload = function (e) {
          var img = $('img#drag_drop_review');
          img.attr('src', e.target.result);
        }
        reader.readAsDataURL(AntsAdmin.uploadFiles[0]);
      }
    });
  }
  