// call back periodically to the server to renew the lock while this page remains open
function createRequestObject(){

	var http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
			// See note below about this line
		}
	} 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('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	
	return http_request;

}

function makeRequest(divname,article) {
	var http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
			// See note below about this line
		}
	} 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('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = function() { 
		//alertContents(http_request);
		//showContents(divname,http_request)
		// not showing the result, just doing it behind the scenes
		};
	http_request.open('POST', 'http://legion/fourseasons/articles/ajah.renewlock.php', true);
	http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	http_request.send('article='+article);
}

function alertContents(http_request) {
	
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			
			alert(http_request.responseText);
		} else {
			alert('There was a problem with the request.');
		}
	}
}

function showContents(divname,http_request) {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			//alert(http_request.responseText);
			document.getElementById(divname).innerHTML = http_request.responseText;
		} else {
			alert('There was a problem with the request.');
		}
	}
}