flex TabNavigator 切换触发事件

非常感谢这们兄弟

http://www.cnblogs.com/yansheng9988/archive/2009/06/10/1500742.html

<mx:TabNavigator width="100%"
			      height="100%"
			      id="tabMain">
	<ercc:Expert id="tabExpert"
				 label="专家"
				 width="100%"
				 height="100%">
	</ercc:Expert>
	<ercc:Team id="tabTeam"
			   label="队伍"
			   width="100%"
			   height="100%">
	</ercc:Team>
</mx:TabNavigator>

private function initTab() : void
{
	var btn:Button;
	for(var i:int=0;i<tabMain.getChildren().length;i++)
	{
		btn = tabMain.getTabAt(i);
		btn.addEventListener(MouseEvent.MOUSE_DOWN,tabClickHandler,false,999999999);
	}
}

private function tabClickHandler(event:MouseEvent):void
{
	var iTabIndex:int = event.currentTarget.parent.getChildIndex(event.currentTarget);
	//终止事件
	event.stopImmediatePropagation();
	//给出提示message
	if(iTabIndex != 1 && currentState == "teamAdd")
	{	
		Alert.okLabel="确定";
		Alert.show("队伍处理未完成","提示信息");	
		tabMain.selectedIndex = 1;
	}
	else
		tabMain.selectedIndex = iTabIndex;	
}