function navigateTo(url, pagetitle, content, container) {
	if(container == false) {
		container = 'ajaxcontentarea';
	}

	/* transform params */
	var url = url.toString();
	var content = content.toString();
	var pagetitle = pagetitle.toString();
	var container = container.toString();

	/* set location */
	SWFAddress.setValue('/'+url+'/');

	/* deliver content */
	var http = new XMLHttpRequest();
	http.open("GET", content, true);
	http.onreadystatechange = function() { //Call a function when the state changes.
		if(http.readyState == 4 && http.status == 200) {
			document.getElementById(container).innerHTML = http.responseText;
		}
	}
	http.send(null);
}