Another cool thing: List all proberties for the object (requires javascript support in your browser): Go!

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The code:
<object type="image/gif" data="gfx/iama_gif.gif" id="player" width="200" height="50"></object>
<script type="text/javascript">
function a(){
var e ='d';
var testObj=document.getElementById('player');
for (var key in testObj) {
var newp = document.createElement('p');
var text = document.createTextNode(key+' '+testObj[key]);
newp.appendChild(text);
document.getElementById('prop').appendChild(newp);
}
}</script>