<script language="javascript">
function expand() {
    document.getElementById("exp-banner").style.clip="rect(0px 600px 300px 0px)";
}
function retract() {
    document.getElementById("exp-banner").style.clip="rect(0px 600px 150px 0px)";
}
</script>

<div style="position: relative; width: 600px; height: 150px">
    <div id="exp-banner" style=" position:absolute;clip: rect(0px 600px 150px 0px)">
		<object ... width="600" height="300">
				<embed ... width="600" height="300"></embed>
		</object>
	</div>
</div>

import fl.controls.*;
import fl.events.*;

var carregarImg01:Loader = new Loader();
var enderecoImg01:URLRequest = new URLRequest("arquivo01.jpg");
carregarImg01.load(enderecoImg01);

var botao01:Sprite = new Sprite();
botao01.addChild(carregarImg01);
botao01.addEventListener(MouseEvent.MOUSE_OVER, mOver01);
botao01.addEventListener(MouseEvent.CLICK, onClick);
addChild(botao01);

var carregarImg02:Loader = new Loader();
var enderecoImg02:URLRequest = new URLRequest("arquivo02.jpg");
carregarImg02.load(enderecoImg02);
addChild(carregarImg02);

var botao02:Sprite = new Sprite();
botao02.addChild(carregarImg02);
botao02.addEventListener(MouseEvent.MOUSE_OUT, mOut02);
botao02.addEventListener(MouseEvent.CLICK, onClick);
addChild(botao02);

botao01.visible = true;
botao02.visible = false;

function mOver01(evt:MouseEvent):void {
	botao01.visible = false;
	botao02.visible = true;
	var m1:URLRequest = new URLRequest("javascript:expand();");
	navigateToURL(m1, "_self");
}
function mOut02(evt:MouseEvent):void {
	botao01.visible = true;
	botao02.visible = false;
	var m2:URLRequest = new URLRequest("javascript:retract();");
	navigateToURL(m2, "_self");
}


function onClick(evt:MouseEvent):void{
	var m3:URLRequest = new URLRequest("http://www.google.com.br/");
	navigateToURL(m3, "_top");

}