function SendGetRequest(http, url)
{
   http.open("GET", url, true);
   http.send(null);
}

function SendPostRequest(http, url, params)
{
   http.open("POST", url, true);
   http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   http.setRequestHeader("Content-length", params.length);
   http.setRequestHeader("Connection", "close");
   http.send(params);
}