自定义多选框样式图片

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
        layout="vertical" 
        verticalAlign="middle" 
        backgroundColor="white"> 
  
    <mx:Style> 
        CheckBox { 
            /* Unselected icons */ 
            upIcon: Embed(source="assets/bullet_red.png"); 
            overIcon: Embed(source="assets/bullet_red.png"); 
            downIcon: Embed(source="assets/bullet_yellow.png"); 
            /* Selected icons */ 
            selectedUpIcon: Embed(source="assets/bullet_green.png"); 
            selectedOverIcon: Embed(source="assets/bullet_green.png"); 
            selectedDownIcon: Embed(source="assets/bullet_yellow.png"); 
        } 
    </mx:Style> 
  
    <mx:CheckBox id="cheezburger" 
            label="I can has cheezburger?" 
            fontSize="12" 
            fontWeight="bold" /> 
  
</mx:Application>