[flexcoders] remove border in a list ---make the border of the list invisible

[Nini7016 Nini7016]

Hello 

I wouldn't like to display the border of a list

<mx:List id="listFileUpload"  rowCount="1" height="45" x="10" y="72" 
width="289" visible="false" editable="false"/>

What attribut can i add it to do this (remove the border )

Thank you 

NIni