public void UpdateTriggers()
 {
     doc = HtmlPage.Document;
     if (hrefs != null)
     {
         foreach (var href in hrefs)
         {
             href.DetachEvent("onclick", OnHtmlLinkClick);
         }
     }
     hrefs = from c in doc.GetElementsByTagName("a").Cast<HtmlElement>()
             where c.GetAttribute("class") != null
             where c.GetAttribute("class").Contains("silverlight")
             select c;
     foreach (HtmlElement el in hrefs)
     {
         el.AttachEvent("onclick", OnHtmlLinkClick);
     }
 }