1、让textarea滚动至最底端

textArea.verticalScrollPosition = textArea.maxVerticalScrollPosition;

2、控制datagrid的交换背景颜色

private var defaultAlternatingItemColors:Array = [0xF7F7F7, 0xFFFFFF];

dataGrid.setStyle("alternatingItemColors", defaultAlternatingItemColors);

3、利用activate和deactivate事件来控制Flex应用是否得到焦点

 <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" activate="application_activate(event);" deactivate="application_activate(event);">

 private function application_activate(evt:Event):void {
 arrColl.addItemAt({type:evt.type, time:getTimer()}, 0);
}

4、设置panel边框透明度

 panel.setStyle("borderAlpha", 0.5);