code: function(x, y) {
          // make the proxy look like the source element
          var dragEl = this.getDragEl();
          var clickEl = this.getEl();
          Dom.setStyle(clickEl, "visibility", "hidden");
          this._originalIndex = inputEx.indexOf(clickEl ,clickEl.parentNode.childNodes);
          dragEl.className = clickEl.className;
          dragEl.innerHTML = clickEl.innerHTML;
      }
docs: Create the proxy element