function ajax_handle(ajax) {
		if (ajax.readyState == 4) {
			if (ajax.status == 200) {
				return(ajax.responseText);
			}
			else {
				alert('AJAX response:\nHTTP error code '+ajax.status);
				return false;
			}
		}
	}
/**
 * A framework publikus függvénye
 */
function ajax_query(file, params) {
	if (window.XMLHttpRequest) {
		var ajax = new XMLHttpRequest();
	}
	else if (window.ActiveXObject) {
		try {
			var ajax = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				var ajax = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!ajax) { alert('Cannot create an XMLHTTP instance'); return false; }
	
	// Kérés küldése
	ajax.onreadystatechange = function(){ajax_handle(ajax); }
	if(typeof params=='object') {
		http_params = ''; //lorem=ipsum&name=binny
		for (i in params) {
			params[i] = encodeURIComponent(params[i]);
			if(http_params=='')  http_params = i+'='+params[i];
			else                 http_params += '&'+i+'='+params[i];
		}
		ajax.open('POST',file,false);
		ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		ajax.setRequestHeader("Content-length", http_params.length);
		ajax.setRequestHeader("Connection", "close");
		ajax.send(http_params);
	}
	else {
		ajax.open('GET',file,false);
		ajax.send(null);
	}

	if(self.ajax_handle) {
		return ajax_handle(ajax);
	}
	else return null;
}