initiation a frame in runtime

I have an asp code:

function window_onload()
{
var xmlObj = new ActiveXObject("Microsoft.XMLDOM");
xmlObj.async = false ;
xmlObj.load("flashfiles/xmls/SearchQueryResults_GLDoc.xml");
xmlString = xmlObj.documentElement.xml;

//loading the rest of the GUI
frames.leftPannel.location.href = "LeftPannel.asp"
frames.mainView.InitData();
}

and I can't traslate the last lines into c# , in fact not only I can't
update the frames I cant even chage the color of the html page

Can you help?
10x