http://homepage2.nifty.com/tomoarai/java/exper.html
ちなみに動作するとこのコードが得られる


<object id="testplayer" data="data:application/x-silverlight-2," type="application/x-silverlight-2" height="600" width="600">
<param name="source" value="http://i.yimg.jp/images/gyao/sl/PlayerGyaO.xap?v=2">
<param name="onerror" value="onSilverlightError">
<param name="background" value="#00FFFFFF">
<param name="minRuntimeVersion" value="2.0.31005.0">
<param name="autoUpgrade" value="true">
<param name="enableHtmlAccess" value="true">
<param name="AllowHtmlPopupwindow" value="true">
<param name="Windowless" value="true">
<param name="onLoad" value="pluginLoaded">
<param name="initParams" value="spaceID=1183052242, vid=00597:v07940:v0794000000000524555, listID=68308, enableIM=1">
<a href="http://go.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;">
<img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Microsoft Silverlight を取得" style="border-style: none;">
</a></object>