import mx.styles.CSSStyleDeclaration;

var new_style:Object = new CSSStyleDeclaration();
_global.styles.myStyle = new_style;

new_style.setStyle("textAlign", "right");
new_style.setStyle("selectionColor", "white");
new_style.setStyle("useRollOver", false);
// RectBorder 类中的 borderStyle
new_style.setStyle("borderStyle", "none");

my_cb.addItem({data:1, label:"One"});
my_cb.addItem({data:2, label:"Two"});
my_cb.setStyle("styleName", "myStyle");