The code below is incorrectly setup. The script is most likely fine, but you shouldn't be centering using the center tags as they are not really used anymore. Either way you didn't close that tag you have 2 opening center tags. It should have a forward slash / in the last one:
<center><script type="text/javascript" src="swfobject.js"></script><div id="CC4320491">Form Object</div><script type="text/javascript">var so = new SWFObject("myjukebox.swf","", "300", "60", "7,0,0,0", "#ffffff");so.addParam("classid", "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000");so.addParam("quality", "high");so.addParam("scale", "noscale");so.addParam("salign", "lt");so.write("CC4320491");</script>
<center>
should be
<center><script type="text/javascript" src="swfobject.js"></script><div id="CC4320491">Form Object</div><script type="text/javascript">var so = new SWFObject("myjukebox.swf","", "300", "60", "7,0,0,0", "#ffffff");so.addParam("classid", "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000");so.addParam("quality", "high");so.addParam("scale", "noscale");so.addParam("salign", "lt");so.write("CC4320491");</script>
</center>
I don't think that's your menu issue though, haven't delved that far yet