I'm trying to manipulate an Youtube object via JavaScript. But once I call a function like seekTo(), JS engine tells me there is no such function:

```
<script type="text/javascript" src="swfobject.js"></script>    
<div id="ytapiplayer"></div>
<script type="text/javascript">
var params = { allowScriptAccess: "always" };
var atts = { id: "ytplayer" };
swfobject.embedSWF("http://www.youtube.com/v/tS3J2BkLamQ?enablejsapi=1&playerapiid=ytplayer", 
               "ytapiplayer", "425", "356", "8", null, null, params, atts);
</script>
<a href="javascript:void(0);" onclick="ytplayer.seekTo(10,true)">seek</a>

```

There are *three* IDs in the [official example](http://code.google.com/intl/en-EN/apis/youtube/js_api_reference.html#Examples). I tried them all with no result.

Fiefox 6 AFAIK

**UPD** Finally I figured out such code must be run at the server side.