stop();
import flash.net.navigateToURL;
import flash.net.URLRequest;
import flash.events.MouseEvent;
var getYouTube:URLRequest = new	URLRequest("http://www.youtube.com");

/// B Button Get a URL ///
B_btn.addEventListener(MouseEvent.CLICK, bClick);
function bClick(event:MouseEvent):void{
	navigateToURL(getYouTube);
}
					

/// G Button Property ///

G_btn.addEventListener(MouseEvent.CLICK, gClick);
G_btn.addEventListener(MouseEvent.MOUSE_OUT, gOut);

function gClick(event:MouseEvent):void{
	gotoAndStop("getJargon");
}
function gOut(event:MouseEvent):void{
	gotoAndStop(1);
}


/// R Button Property ///

R_btn.addEventListener(MouseEvent.CLICK, rClick);
R_btn.addEventListener(MouseEvent.MOUSE_OUT, rOut);


function rClick(event:MouseEvent):void{
	R_btn.alpha -= 0.1;
}
function rOut(event:MouseEvent):void{
	R_btn.alpha = 1;
}

How to use Buttons

ActionScript 3