I can rip some out of my page, but it's ASP and javascript os you'll need to translate.

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Client side:

// Could have very large strings, so wrap in XML and post
var objXMLDoc = new ActiveXObject( "MSXML2.DOMDocument");
objXMLDoc.async = false;
objXMLDoc.resolveExternals = false;
objXMLDoc.loadXML( "" + strParams + "" + strUnassigned + "" + intRoundNo + "" + intGroupID + "")

// ...post...
var objSrvHTTP = new ActiveXObject( "MSXML2.XMLHTTP");
objSrvHTTP.open( "POST", gsPathCupComps + "Draws_Save.asp", false);
objSrvHTTP.send( objXMLDoc);

if ( objSrvHTTP.responseText == "True") {
// Success


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Server Side ( Draws_Save.asp):

Dim objXMLDoc, objBusCupComp, blnRetVal

'- GEt XML from request object
Set objXMLDoc = Server.CreateObject("Msxml2.DOMDocument")
objXMLDoc.load( Request)

strDrawDetails = objXMLDoc.documentElement.selectSingleNode( "Params").text



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This is ripped working code, so should help