var http_request = false;
function makePOSTRequest(url, parameters) 
{
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
		} else if (window.ActiveXObject) { // IE
			try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					http_request = new ActiveXObject("Microsoft.XMLHTTP");
					} catch (e) {}
				}
			}
			if (!http_request) {
				alert('Cannot create XMLHTTP instance');
				return false;
			}

			http_request.onreadystatechange = alertContents;
			http_request.open('POST', url, true);
			http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
			http_request.setRequestHeader("Content-length", parameters.length);
			http_request.setRequestHeader("Connection", "close");
			http_request.send(parameters);
		}
		
function alertContents() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			result = http_request.responseText;
			if (logged == true &&  result == "OK")
			{
				var bar = document.getElementById('progressBar');
				var statusText = document.getElementById('statusText');
				if (bar != null) (bar.parentNode).removeChild(bar);
				statusText.innerHTML = 'Score submitted!';
			}
		} else {
			if (logged == true)
			{
				var bar = document.getElementById('progressBar');
				var statusText = document.getElementById('statusText');
				if (bar != null) (bar.parentNode).removeChild(bar);
				statusText.innerHTML = 'Error submitting (please check your internet connection) <a href="#" onclick="javascript:SubmitResults()">retry</a>';
			} 
		}
	}
}