function ajax() {
	this.type = 'ajax';
	this.renew();
}

ajax.prototype.renew = function () {
	if (isIE()) {
		this.request = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		this.request = new XMLHttpRequest();
	}
}
	

ajax.prototype.send = function(url, callback, postdata) {
	var type = 'POST';
	if (!postdata) {
		type = 'GET';
		postdata = '';
	}
	this.renew();
	this.request.onreadystatechange = callback;
	// TODO: rewrite
	this.request.open(type,web_root + url,true);
	//this.request.open(type,url,true);
	this.request.send(postdata);
}
datetime_select = function(name, show_time) {
	this.name = name;
	this.show_time = show_time;
	this.ajax = new ajax();
}

datetime_select.prototype.refresh = function(selected, month, year) {
	var url = 'admin.php?page=datetime_select_ajax';
	url += '&timestamp=' + selected;
	url += '&month=' + month;
	url += '&year=' + year;
	url += '&show_time=' + this.show_time;
	url += '&name=' + this.name;

	current_datetime_select = this;
	this.ajax.send(url, datetime_select_callback, true);
}
	

var current_datetime_select = null;
datetime_select_callback = function() {
	if (current_datetime_select.ajax.request.readyState == 4) {
		document.getElementById(current_datetime_select.name + '_calendar').innerHTML = current_datetime_select.ajax.request.responseText;
	}
}

var current_datetime_last_date = 0;
datetime_select_set = function(name, dat, time, timestamp) {
	if (!dat) {
		dat = current_datetime_last_date;
	}

	current_datetime_last_date = dat;
	var str = '';
	if (time) {
		hour = document.getElementById(name + '_hour').value;
		str += hour;
		str += ":";
		minute = document.getElementById(name + '_minute').value;
		str += minute;
		str += " ";
	} else {
		hour = 0;
		minute = 0;
	}

	str += dat;
	document.getElementById(name).value = str;
	// zachovame cas
	timestamp += hour * 3600 + minute * 60;
	eval(name + '_var.refresh(' + timestamp + ');');
}
getValue = function(node, name) {
	if (!node.getElementsByTagName(name)) {
		alert (node + ' nema ' + name);
		return;
	}
	vals = node.getElementsByTagName(name);
	if (vals.length == 0) {
		return null;
	} else {
		if (vals[0].firstChild != null) {
			return vals[0].firstChild.nodeValue;
		} else {
			return null;
		}
	}
}

isIE = function() {
	return (navigator.appName == "Microsoft Internet Explorer");
}

getEl = function(id) {
	return document.getElementById(id);
}

setAttr = function(obj, prop, val) {
	if (isIE()) {
		eval('obj.' + prop + ' = val;');
	} else {
		if (prop == 'className') {
			prop = 'class';
		}
		obj.setAttribute(prop, val);
	}
}

in_array = function(arr, needle)
{
	for (var each in arr)
	{
		if (arr[each] === needle) {
			return each;
		}
	}
	return -1;
};
maillist_add_request = function() {
	this.ajax = new ajax();
}

maillist_add_request.prototype.send = function() {
	current_maillist_add_request = this;

	var mg = getEl('maillist_group_front');
	var el = null;

	var groups = '';

	for(var child in mg.childNodes) {
		el = mg.childNodes[child];
		if (el.id && el.id.substring(0, 'maillist_group_front_'.length) == 'maillist_group_front_') {
			if (el.checked) {
				if (groups != '') {
					groups += ',';
				}

				groups += el.id.substring('maillist_group_front_'.length);
			}
		}
	}

	var email = getEl('maillist_email').value;

	var url = web_root + 'front.php?page=maillist_add_request_ajax&email=' + email + '&groups=' + groups;
	this.ajax.send(url, maillist_add_request_callback, null);
}

var current_maillist_add_request = null;

maillist_add_request_callback = function() {
	var rr = current_maillist_add_request;

	if (rr.ajax.request.readyState == 4) {
		getEl('maillist_wrapper').innerHTML = getValue(rr.ajax.request.responseXML, 'response');
		if (searchObj != null) {
			searchObj.search();
		}
	}
}
/*
 * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
 * in FIPS PUB 180-1
 * Version 2.1a Copyright Paul Johnston 2000 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for details.
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hex_sha1(s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));}
function b64_sha1(s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));}
function str_sha1(s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));}
function hex_hmac_sha1(key, data){ return binb2hex(core_hmac_sha1(key, data));}
function b64_hmac_sha1(key, data){ return binb2b64(core_hmac_sha1(key, data));}
function str_hmac_sha1(key, data){ return binb2str(core_hmac_sha1(key, data));}

/*
 * Perform a simple self-test to see if the VM is working
 */
function sha1_vm_test()
{
  return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
}

/*
 * Calculate the SHA-1 of an array of big-endian words, and a bit length
 */
function core_sha1(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << (24 - len % 32);
  x[((len + 64 >> 9) << 4) + 15] = len;

  var w = Array(80);
  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;
  var e = -1009589776;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;
    var olde = e;

    for(var j = 0; j < 80; j++)
    {
      if(j < 16) w[j] = x[i + j];
      else w[j] = rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
      var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
                       safe_add(safe_add(e, w[j]), sha1_kt(j)));
      e = d;
      d = c;
      c = rol(b, 30);
      b = a;
      a = t;
    }

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
    e = safe_add(e, olde);
  }
  return Array(a, b, c, d, e);

}

/*
 * Perform the appropriate triplet combination function for the current
 * iteration
 */
function sha1_ft(t, b, c, d)
{
  if(t < 20) return (b & c) | ((~b) & d);
  if(t < 40) return b ^ c ^ d;
  if(t < 60) return (b & c) | (b & d) | (c & d);
  return b ^ c ^ d;
}

/*
 * Determine the appropriate additive constant for the current iteration
 */
function sha1_kt(t)
{
  return (t < 20) ?  1518500249 : (t < 40) ?  1859775393 :
         (t < 60) ? -1894007588 : -899497514;
}

/*
 * Calculate the HMAC-SHA1 of a key and some data
 */
function core_hmac_sha1(key, data)
{
  var bkey = str2binb(key);
  if(bkey.length > 16) bkey = core_sha1(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
  return core_sha1(opad.concat(hash), 512 + 160);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left.
 */
function rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert an 8-bit or 16-bit string to an array of big-endian words
 * In 8-bit function, characters >255 have their hi-byte silently ignored.
 */
function str2binb(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (32 - chrsz - i%32);
  return bin;
}

/*
 * Convert an array of big-endian words to a string
 */
function binb2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
  return str;
}

/*
 * Convert an array of big-endian words to a hex string.
 */
function binb2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of big-endian words to a base-64 string
 */
function binb2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * (3 -  i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}
function stat() {
	this.ajax = new ajax();
	this.props = new Array();
}

stat.prototype.append = function(prop, value) {
	if (value == null) {
		value = 'unknown';
	}

	this.props[this.props.length] = new Array(prop, escape(value));
}

stat.prototype.appendNavigator = function() {
	this.append('screen_resolution', screen.width + 'x' + screen.height);
	this.append('screen_color_depth', screen.colorDepth);

	this.append('app_name', navigator.appName);
	this.append('app_code_name', navigator.appCodeName);
	this.append('app_minor_version', navigator.appMinorVersion);
	this.append('app_name', navigator.appName);
	this.append('app_version', navigator.appVersion);
	this.append('cookie_enabled', navigator.cookieEnabled);
	this.append('cpu_class', navigator.cpuClass);
	this.append('platform', navigator.platform);
	this.append('user_agent', navigator.userAgent);
	this.append('system_language', navigator.systemLanguage);
}

stat.prototype.send = function() {
	url = 'service.php?page=stat_ajax';
	for(var prop in this.props) {
		url = url + "&stat_" + this.props[prop][0] + '=' + this.props[prop][1];
	}
	this.ajax.send(url, prazdna, null);
}

function prazdna() {}
search_ajax = function(id) {
	this.ajax = new ajax();
	this.id = id;
	this.timeout = null;
	this.last = '';
}

search_ajax.prototype.search = function(qs) {
	var url = 'front.php?page=search_ajax&search_text=' + qs;
	current_search_ajax = this;

	this.img(true);

	this.ajax.send(url, search_ajax_callback);
}

search_ajax.prototype.focus = function() {
	getEl('results').style['display'] = 'block';
	this.check();
}

search_ajax.prototype.check = function() {
	this.transport();
	var val = getEl('search_text').value;
	if (val != this.last) {
		this.last = val;
		this.search(val);
	}

	this.timeout = setTimeout('panel_search_ajax.check()', 3000);
}

search_ajax.prototype.submit = function() {
	this.transport();
	getEl('search_text_visible').value = '';
}

search_ajax.prototype.transport = function() {
	getEl('search_text').value = getEl('search_text_visible').value;
}

search_ajax.prototype.blur = function() {
	getEl('results').style['display'] = 'none';
	clearTimeout(this.timeout);
}

search_ajax.prototype.img = function(show) {
	if (show) {
		getEl('img_searching').style['visibility'] = 'visible';
	} else {
		getEl('img_searching').style['visibility'] = 'hidden';
	}
}

var current_search_ajax = null;

search_ajax_callback = function() {
	var sa = current_search_ajax;
	if (sa.ajax.request.readyState == 4) {
		sa.img(false);

		getEl(sa.id).innerHTML = sa.ajax.request.responseText;
	}
}