I have this floating flash script. Where when the page loads flash slides into the page and starts to play a short clip. The problem is I don't want it to play when the viewing comes back the second time if they choose a "don't show again" button. Here is the script I have and maybe you could help me with what to do here. thanks.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Untitled Document</title>
<script src="Scripts/AC_RunActiveContent.js" type="text/javascript"></script>
var timeout;
function appear(){
var the_style = getStyle("floatingflash");
if (the_style) {
var current_top = parseInt(the_style.top);
var new_top = current_top + 5;
if (document.layers) {
the_style.top = new_top;
} else {
the_style.top = new_top + "px";
if (new_top < 150) {
the_timeout = setTimeout('appear();',10);
} // appear
function disappear() {
var the_style = getStyle("floatingflash");
the_style.display = 'none';
} // disappear
function getStyle(ref) {
if(document.getElementById && document.getElementById(ref)) {
return document.getElementById(ref).style;
} else if (document.all && document.all(ref)) {
return document.all(ref).style;
} else if (document.layers && document.layers[ref]) {
return document.layers[ref];
} else {
return false;
} // getStyle
#floatingflash {
border:1px solid red;
<body onload="appear();">
<div id="floatingflash" style="top:-400px;left:0px;margin-left:250px;">
<a href="javascript:disappear();">X</a><br />
<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0','width','457','height','290','title','Saddle','src','saddle','quality' ,'high','pluginspage','http://www.macromedia.com/go/getflashplayer','movie','saddle' ); //end AC code
</script><noscript><object classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="457" height="290" title="Saddle">
<param name="movie" value="saddle.swf" />
<param name="quality" value="high" />
<embed src="saddle.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="457" height="290"></embed>