FABridge教程(Flex+Ajax) 2

首先在fademo.mxml中声明一个button，并添加一个btnClick方法：
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<?xml version="1.0" encoding="utf-8"?> 
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"   
               xmlns:s="library://ns.adobe.com/flex/spark"   
               xmlns:mx="library://ns.adobe.com/flex/halo" minWidth="0" minHeight="0" width="400" height="300" xmlns:bridge="bridge.*"> 
    <fx:Declarations> 
        <bridge:FABridge/> 
        <!-- Place non-visual elements (e.g., services, value objects) here --> 
    </fx:Declarations> 
    <fx:Script> 
        <!--[CDATA[  
            import mx.controls.Alert;  
            public function btnClick():void  
            {  
                Alert.show("按钮被点击了","title");  
            }  
        ]]--> 
    </fx:Script> 
    <s:TextInput x="160" y="96" id="txtName"/> 
    <s:Button x="218" y="139" label="按钮" id="btn"/> 
</s:Application> 
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
      xmlns:s="library://n