var o;
function ajax_request(method, uri, arg, func) {
	var xmlRequest = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject("Msxml2.XMLHTTP");
	if(xmlRequest == null) return;
	xmlRequest.open(method, uri, true);
	xmlRequest.onreadystatechange = function() {
		if(xmlRequest.readyState == 4) if(xmlRequest.status == 200) eval(func+"(xmlRequest)");
	};
	xmlRequest.send(arg);
}
function create_html(html) {
	o.innerHTML = html.responseText;
}