/* getElementById */

function e(a)
{
  return document.getElementById(a);
}

function oe(a)
{
  return window.opener.document.getElementById(a);
}

/* windows */

function openWindow(link, jmeno, w, h)
{
  window.open(link, jmeno, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=no, width='+w+', height='+h).focus();
}

function closePopupAndReloadParent()
{
  window.opener.window.location.reload();
  window.close();
}

function resizeWindow(w, h)
{
  window.resizeTo(w, h);
}

/* checkbox */

function changeCheckbox(id)
{
  var ch = e(id);
  if (ch)
    ch.checked = !ch.checked;
}

/* AJAX */

function createAjax()
{
  if (window.ActiveXObject)
    hr = new ActiveXObject("Microsoft.XMLHTTP");
  else
    hr = new XMLHttpRequest();
  
  return hr;
}

/* URL */

function urlencode(str) 
{
	str = escape(str);
	str = str.replace('+', '%2B');
	str = str.replace('%20', '+');
	str = str.replace('*', '%2A');
	str = str.replace('/', '%2F');
	str = str.replace('@', '%40');
	
	return str;
}

function urldecode(str) 
{
	str = str.replace('+', ' ');
	str = unescape(str);

	return str;
}

var Url =
{

	// public method for url encoding
	encode : function (string) {
		return escape(this._utf8_encode(string));
	},

	// public method for url decoding
	decode : function (string) {
		return this._utf8_decode(unescape(string));
	},

	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";

		for (var n = 0; n < string.length; n++) {

			var c = string.charCodeAt(n);

			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}

		}

		return utftext;
	},

	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;

		while ( i < utftext.length ) {

			c = utftext.charCodeAt(i);

			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}

		}

		return string;
	}

}


/* cookie */

function createCookie(name,value,days) 
{
	if (days) 
  {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) 
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) 
{
	createCookie(name,"",-1);
}


function addFavorite(linkObj, addUrl, addTitle) 
{ 
  if (document.all && !window.opera) 
  {
    window.external.AddFavorite(addUrl,addTitle); 
    return false; 
  } 
  else if (window.opera && window.print) 
  {
    linkObj.title = addTitle; 
    return true; 
  } 
  else if ((typeof window.sidebar == 'object') && (typeof window.sidebar.addPanel == 'function')) 
  {
    //if (window.confirm(question)) 
    //{
      //window.sidebar.addPanel(addTitle,addUrl,''); 
      return false; 
    //} 
  } 
  //window.alert(text); 
  return false; 
}

/* DALSI */

/*
 * Zruší provádění dalších eventů.
 */
function cancelEventBubbling(e)
{
  if (!e) e = window.event;
  e.cancelBubble = true;
  if (e.stopPropagation) e.stopPropagation();
}