如何使用Flex ProgressBar

<?xml version="1.0"?>  
<!-- Simple example to demonstrate the ProgressBar control. -->  
<!--  
    如何使用Flex ProgressBar  
    MyShareBook.cn 翻译  
-->  
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">  
  
    <mx:Script>  
        <![CDATA[  
            
          private var j:uint=10;  
            
          // Event handler function to set the value of the  
          // ProgressBar control.  
          private function runit():void  
          {  
              if(j<=100)  
              {  
                 bar.setProgress(j,100);  
                 bar.label= "CurrentProgress" + " " + j + "%";  
                 j+=10;  
              }  
              if(j>100)  
   &nbs