Access ASP page from Silverlight 1.1 control

Say you want to alter the contents of an ASP page from within a Silverlight control on the page. To do so, get the HtmlDocument from HtmlPage and use GetElementById:

//This hides the div with id=contentId and displays the div with id=content2Id
HtmlDocument document = HtmlPage.Document;
document.GetElementByID("contentId").SetStyleAttribute("display", "none");
document.GetElementByID("content2Id").SetStyleAttribute("display", "block");