docs: function addScrollButtons() {
  		var dropdown = this;
  
  		if(!this._topScrollButton && !this._bottomScrollButton) { // if scroll buttons haven't been made yet
  			this._topScrollButton = document.createElement("button");
  			this._bottomScrollButton = document.createElement("button");
  			this._topScrollButton.classList.add("menuScrollButton", "menuTopScrollButton", "core-sprite-openarrow");
  			this._bottomScrollButton.classList.add("menuScrollButton", "menuBottomScrollButton", "core-sprite-openarrow");
  
  			this._topScrollButton.addEventListener("mousedown", function(evt){ //$NON-NLS-0$
  				if (this._activeScrollInterval) {
  					window.clearInterval(this._activeScrollInterval);
  				}
  				this._activeScrollInterval = window.setInterval(scrollUp.bind(null, evt.shiftKey ? 20 : 2), 10);
  			}.bind(this));
  			this._topScrollButton.addEventListener("mouseup", function(){ //$NON-NLS-0$
  				if (this._activeScrollInterval) {
  					window.clearInterval(this._activeScrollInterval);
  					this._activeScrollInterval = null;
  				}
  			}.bind(this));
  			
  			this._bottomScrollButton.addEventListener("mousedown", function(evt){ //$NON-NLS-0$
  				if (this._activeScrollInterval) {
  					window.clearInterval(this._activeScrollInterval);
  				}
  				this._activeScrollInterval = window.setInterval(scrollDown.bind(null, evt.shiftKey ? 20 : 2), 10);
  			}.bind(this));
  			this._bottomScrollButton.addEventListener("mouseup", function(){ //$NON-NLS-0$
  				if (this._activeScrollInterval) {
  					window.clearInterval(this._activeScrollInterval);
  					this._activeScrollInterval = null;
  				}
  			}.bind(this));
  		
  			this._dropdownNode.parentNode.insertBefore(this._topScrollButton, this._dropdownNode);
  			this._dropdownNode.parentNode.insertBefore(this._bottomScrollButton, this._dropdownNode.nextElementSibling);
  			this._dropdownNode.style.overflow = "hidden";
  		}
  		
  		updateScrollButtonVisibility.call(this);
  		return true;
  		
  		function scrollDown(increment) {
  			dropdown._dropdownNode.scrollTop+=increment;
  			updateScrollButtonVisibility.call(dropdown);
  		}
  		
  		function scrollUp(increment) {
  			dropdown._dropdownNode.scrollTop-=increment;
  			updateScrollButtonVisibility.call(dropdown);
  		}
  	}