使用BorderContainer设置背景图片

<?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/mx" minWidth="955" minHeight="600">
 <fx:Declarations>
  <!-- 将非可视元素（例如服务、值对象）放在此处 -->
 </fx:Declarations>
 <fx:Style>
  @namespace s "library://ns.adobe.com/flex/spark";
  @namespace mx "library://ns.adobe.com/flex/mx";
  .mybackground {  
   /* backgroundImage: Embed(source="images/b.png");
   backgroundSize: 800px;
   backgroundColor: #cccccc; */   
   font-size:14;   
   /* fontSize:24; ?*/   
   background-image:Embed("../Login/MainTitleBK.png");   
   /*background-position:right,bottom;*/  
   /*background-blend:multiply;*/   
   background-size:"100%";   
   backgroundImageFillMode: repeat;
  } 
  s|Button {   
   cornerRadius: 9;   
   color: #cc0000;  
  }
  .myButton {   
   cornerRadius: 9;  
   color: #00ff00;   
  } 
  s|Panel{  
   backgroundColor: #e8e8e8;  
  } 
 </fx:Style>
 <s:BorderContainer styleName="mybackground" width="100%" height="80" backgroundImageFillMode="repeat" borderStyle="solid" borderWeight="0" borderVisible="false"> 
  <s:Panel x="10" y="10" width="250" height="200" id="panel1" title="用户登录" fontFamily="Georgia" textAlign="left"> 
   <s:Label x="24" y="32" text="用户名" /> 
   <s:Label x="36" y="59" text="密码" /> 
   <s:TextInput x="74" y="27" id="txtUsername"/>   
   <s:TextInput x="74" y="57" id="txtPassword" displayAsPassword="true"/>  
   <s:Button x="36" y="104" label="登录" id="btnLogin"/>   
   <s:Button x="132" y="104" label="重置" id="btnReset" styleName="myButton"/>  
  </s:Panel>  
 </s:BorderContainer> 
</s:Application>