<div id="silverlightHost" style="width:275px;

height:324px;background-color:transparent;float:left">
<object data="data:application/x-silverlight-2," 

type="application/x-silverlight-2" style="width:100%;height:100%;position:absolute">
            <param name="source" value="../ClientBin/Silverlight.xap"/>
            <param name="onerror" value="onSilverlightError" />
            <param name="onload" value="onSilverlightLoaded" />
            <param name="background" value="transparent" />
            <param name="windowless" value="true" />
            <param name="minRuntimeVersion" value="2.0.31005.0" />
            <param name="autoUpgrade" value="true" />
<a  style="text-decoration: none;">
<img src=http://go.microsoft.com/fwlink/?LinkId=108181 

alt="Get Microsoft Silverlight" style="border-style: none"/>
            </a>
        </object>
        <iframe style='visibility:hidden;height:0;width:0;border:0px'></iframe>
    </div>

function onSilverlightHomePeoplePickerLoaded(sender, args) {            
      var objElement = sender.getHost();
      var divHost = objElement.parentNode;
}

<span>
  <object>
    .
  </object>
</span>
      

<div id="silverlightHost"  style="height:100%;">        
     <asp:Silverlight ID="Xaml1" runat="server" Source="~/ClientBin/SilverlightApplication1.xap" 

MinimumVersion="2.0.31005.0" Width="100%" Height="100%" OnPluginLoaded="onSilverlightLoaded" />
</div>
     

function onSilverlightHomePeoplePickerLoaded(sender, args) {            
      var objElement = sender.get_element();
      var divHost = objElement.parentNode.parentNode;
}