<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        <![CDATA[
      
            private var htmlData:String="<br>This label displays <b>bold</b> and <i>italic</i> HTML-formatted text.";
                                         
            private function displayHTML():void {
                simpleLabel.htmlText= htmlData;
            }
          
            private function displayText():void {
                simpleLabel.text="This Label displays plain text.";
            }         
        ]]>
    </mx:Script>

   
      <mx:Label id="simpleLabel" text="This Label displays plain text."/>
      <mx:Button id="Display" label="Click to display HTML Text" click="displayHTML();"/>
      <mx:Button id="Clear" label="Click to display plain text" click="displayText();"/>
  
</mx:Application>