Why is getElementById Null?

[jaydee123]

I have a very simple flash program that plays music. It consists of a play pause button and a timer that shows the current position of the song. I'm trying to make it possible to pause or play the song using a regular form button.

<div class="musicplayer_playpause">
            <script type="text/javascript">
            AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','width','65','height','68','src','player','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','wmode','transparent','id','flashobject','movie','player','flashvars','id=<?=$cur_songid;?>&type=<?=$_GET["type"];?>&csid=<?=$cur_songid;?>&l=<?=$Arrcntt+1;?>"' ); //end AC code
            </script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0" id="flashobject" width="65" height="68">
              <param name="movie" value="player.swf" allowscriptaccess="always"/>
              <param name="quality" value="high" />
              <param name="wmode" value="transparent" />
        <param name="id" value="flashobject" />
        <param name="swliveconnect" value="true" />
              <embed src="player.swf" name="flashobject" width="65" height="68" quality="high" allowscriptaccess="always" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" wmode="transparent" swliveconnect="true" ></embed>
          </object>
          </noscript></div>

Here's the Javascript function, which I put in the section:

<script type="text/javascript">
function Pause() {
var flash =  document.getElementById('flashobject');
flash.PlayPause;
}
</script>

And finally here's the button I'm using:

<form>
<input type="button" value="Play" name="Play" onClick="Pause();"> 
</form>

When I click the button, Firefox's error console says "Flash is null" What am I doing wrong?

[ShawnCplus]

You have the object inside a block so it's not being rendered if you have javascript enabled.