FLEX ERROR

Child elements specifying default property value must be contiguous

分析：FlashBuilder4的MXML文件上，不能把<fx:Script>...</fx:Script>标签放在其它标签中间，如：

    <s:Button label="aaa"/>  

    <fx:Script>  

        <![CDATA[ 

            protected function button1_clickHandler(event:MouseEvent):void  

            {  

                txt.text ="的确很有flash的风范啊，难怪给改叫FlashBuilder"; 

            } 

        ]]>  

    </fx:Script> 

    <org:FormPanel id="a1" isClickable="true" isClose="false" layout="vertical" >  

        <s:Button label="HAHA" click="button1_clickHandler(event)"/>  

        <mx:Label id="txt" text="速度好像快了很多啊" x="3" y="26"/>  

    </org:FormPanel>  

ArgumentError: Error #1063: Argument count mismatch Expected 0,got 1.

 I received this error when an event handler I created did not contain an expected parameter. Somehow the compiler missed it but an error was thrown in the browser. The fix was easy. I forgot to add in the event object. Adding that in fixed the problem.

          import flash.events.MouseEvent;
        directorySearch_txt.addEventListener(FocusEvent.FOCUS_OUT,directoryFocusOut); 
          // this line generated no errors in flex but generated errors at run time 
          public function directoryFocusOut():void { 
               // do something    
          } 
          // adding the event object cleared the error 
          public function directoryFocusOut( event:FocusEvent):void {                 // do something               }