This the code you'd use for the Flash Banner

<script type="text/javascript">
// Square Top Left
var squaretopleft = ExpandableBanners.banner("squaretopleft", "flash/300X300.swf", 300, 300);
squaretopleft.setCloseImage("images/blank.gif", 'left', 'top');
squaretopleft.animated = false;
squaretopleft.setDirection('up', 'right');
squaretopleft.expandOnClick = true;
</script>

<script type="text/javascript" src="swfobject/swfobject.js"></script>
<script type="text/javascript">
swfobject.embedSWF("flash/125X125.swf", "large_exp", "125", "125", "9.0.0", "swfobject/expressInstall.swf");
</script>

<body>

<div id="squaretopleft" style="width:125px;height:125px;">
<div id="large_exp"> Here is where you put your backup image. <img src="images/square.jpg">
</div>
</div>

</body>