initialize="init();">
[Embed("a.gif")]
public var os:Class;
[Embed("b.gif")]
public var ds:Class;
[Embed("a.gif")]
public var us:Class;
private function init():void {
b1.setStyle("upSkin", us);
b1.setStyle("overSkin", os);
b1.setStyle("downSkin", ds);
}