docs: function () {
              var node, sel, range;
              if (window.getSelection) {
                  sel = window.getSelection();
                  if (sel.rangeCount) {
                      range = sel.getRangeAt(0);
                      if (!range.collapsed) {
                          node = sel.anchorNode.parentNode;
                      }
                  }
              } else if (document.selection) {
                  node = document.selection.createRange().parentElement();
              }
              return node;
          }