code: public void setEnabled(boolean enabled) {
  		this.enabled = enabled;
  		if (enabled) {
  			DOM.setElementProperty(lineElement, "className", SLIDER_LINE);
  		} else {
  			DOM.setElementProperty(lineElement, "className", SLIDER_LINE + " "
  					+ SLIDER_LINE_DISABLED);
  		}
  		redraw();
  	}
docs: Sets whether this widget is enabled.
  
  @param enabled
  true to enable the widget, false to disable it