as with most silverlight to html interactions, you will need to access the DOM object of the page the silverlight is hosted on, and then you can call any number of things on that element.
From Silverlight:
Code:
HtmlPage.Document.GetElementById("elementId");
Then in your web page:
Code:
<div id="elementId">put content here</div>
You could even use an IFrame to navigate to a page as well.
The following article may help if you want to use the IFrame approach.
http://blogs.msdn.com/markda/archive/20 ... ght-2.aspx