/*************************************/
/* Ajax.js copyright by InOdesign    */
/* Version: 2.0                      */
/*                                   */
/* All rights reserved               */
/* Internet: http://www.inodesign.de */
/* E-Mail: apirequest@inodesign.de   */
/*************************************/

var ajax_http = createRequestObject();
var ajax_waiting = false;
var ajax_stack = new Array();
var ajax_timer = null;

function createRequestObject() {
    return (navigator.appName == "Microsoft Internet Explorer" ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest());
}

function ajax(action) {
	if (typeof action == 'object') ajax_stack.push(action);

	if (ajax_waiting) {
		window.clearTimeout(ajax_timer);
 		ajax_timer = window.setTimeout("ajax();",100);
		return;
	}

	if (ajax_stack.length == 0) return;

	var ajax_cmd = '';
	for(var key in ajax_stack[0]) ajax_cmd += (ajax_cmd ? '&' : '') + key + '=' + (ajax_stack[0][key] ? ajax_stack[0][key].split('&').join('%amp;') : false);

	ajax_waiting = true;
	var ajax_randomizer = new Date();

	with (ajax_http) {
		open('POST', '/ajax.php?randomizer=' + ajax_randomizer.getTime());
		onreadystatechange = handleResponse;
		setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		setRequestHeader("Content-length", ajax_cmd.length);
		setRequestHeader("Connection", "close");
		send(ajax_cmd);
	}
	window.clearTimeout(ajax_timer);
	ajax_timer = window.setTimeout("ajax();",100);
}

function handleResponse() {
	if (ajax_http.readyState == 4 && ajax_waiting && ajax_http.status == 200) {
		try {
			eval(ajax_http.responseText);
		} catch (err) {
			alert("Error in ajax-response (" + err + ")\n\nResponse:\n" + ajax_http.responseText);
		}
		ajax_stack.shift();
		ajax_waiting = false;
		window.clearTimeout(ajax_timer);
		ajax_timer = window.setTimeout("ajax();",100);
	}
}