import mx.styles.StyleManager;
private var myDynStyle:CSSStyleDeclaration;
private function initApp():void {
myDynStyle = new CSSStyleDeclaration('myDynStyle');
myDynStyle.setStyle('fontSize', 24);
StyleManager.setStyleDeclaration(".myButtonStyle",myDynStyle, true);
}
private function resetStyles():void {
StyleManager.clearStyleDeclaration(".myButtonStyle",true);
}