// if (typeof HTMLElement!="undefined" && !HTMLElement.prototype.insertAdjacentElement) {
// 	HTMLElement.prototype.insertAdjacentElement = function (where, parsedNode) {
// 		switch (where) {
// 			case 'beforeBegin':
// 				this.parentNode.insertBefore (parsedNode, this);
// 			break;
// 			case 'afterBegin':
// 				this.insertBefore (parsedNode, this.firstChild);
// 			break;
// 			case 'beforeEnd':
// 				this.appendChild (parsedNode);
// 			break;
// 			case 'afterEnd':
// 				if (this.nextSibling)
// 					this.parentNode.insertBefore (parsedNode, this.nextSibling);
// 				else
// 					this.parentNode.appendChild (parsedNode);
// 			break;
// 		}
// 	}
// 
// 	HTMLElement.prototype.insertAdjacentHTML = function (where, htmlStr) {
// 		var r = this.ownerDocument.createRange ();
// 		r.setStartBefore (this);
// 		var parsedHTML = r.createContextualFragment(htmlStr);
// 		this.insertAdjacentElement (where, parsedHTML);
// 	}
// 
// 
// 	HTMLElement.prototype.insertAdjacentText = function (where, txtStr) {
// 		var parsedText = document.createTextNode (txtStr)
// 		this.insertAdjacentElement (where, parsedText)
// 	}
// }


// function getElementsByName_iefix (tag, name) {
// 	var elem = document.getElementsByTagName (tag);
// 	var arr = new Array();
// 	for(i = 0, iarr = 0; i < elem.length; i++) {
// 		att = elem[i].getAttribute("name");
// 		if(att == name) {
// 			arr[iarr] = elem[i];
// 			iarr++;
// 		}
// 	}
// 	return arr;
// }

if (typeof HTMLElement != 'undefined') {
	if (typeof HTMLElement.insertAdjacentHTML == 'undefined') {
		HTMLElement.prototype.insertAdjacentElement = function (where, parsedNode) {
			switch (where) {
				case 'beforeBegin':
					this.parentNode.insertBefore (parsedNode, this);
				break;
				case 'afterBegin':
					this.insertBefore (parsedNode, this.firstChild);
				break;
				case 'beforeEnd':
					this.appendChild (parsedNode);
				break;
				case 'afterEnd':
					if (this.nextSibling)
						this.parentNode.insertBefore (parsedNode, this.nextSibling);
					else
						this.parentNode.appendChild (parsedNode);
				break;
			}
		};
	}
	
	if (typeof HTMLElement.insertAdjacentHTML == 'undefined') {
		HTMLElement.prototype.insertAdjacentHTML = function (where, htmlStr) {
			var r = this.ownerDocument.createRange ();
			r.setStartBefore (this);
			var parsedHTML = r.createContextualFragment (htmlStr);
			this.insertAdjacentElement (where, parsedHTML);
		};
	}

	if (typeof HTMLElement.insertAdjacentText == 'undefined') {
		HTMLElement.prototype.insertAdjacentText = function (where, txtStr) {
			var parsedText = document.createTextNode (txtStr);
			this.insertAdjacentElement (where, parsedText);
		};
	}
}

function vybraneOption (vyber) {
  var pole = new Array();
  var pocitadlo = 0;
  for (var i = 0; i < vyber.length; i++) {
    if (vyber.options[i].selected) {
      pole[pocitadlo] = vyber.options[i].value;
      pocitadlo++;
    }
  }
  return pole;
}

function vsechnyOption (vyber) {
  var pole = new Array();
  for (var i = 0; i < vyber.length; i++)
    pole[i] = vyber.options[i].value;
  return pole;
}

function doplnNulu (cislo) {
	if (cislo < 10)
		return '0' + cislo.toString ();
	else
		return cislo.toString ();
}

function f_clientWidth() {
	return f_filterResults (
		window.innerWidth ? window.innerWidth : 0,
		document.documentElement ? document.documentElement.clientWidth : 0,
		document.body ? document.body.clientWidth : 0
	);
}
function f_clientHeight() {
	return f_filterResults (
		window.innerHeight ? window.innerHeight : 0,
		document.documentElement ? document.documentElement.clientHeight : 0,
		document.body ? document.body.clientHeight : 0
	);
}
function f_scrollLeft() {
	return f_filterResults (
		window.pageXOffset ? window.pageXOffset : 0,
		document.documentElement ? document.documentElement.scrollLeft : 0,
		document.body ? document.body.scrollLeft : 0
	);
}
function f_scrollTop() {
	return f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.scrollTop : 0,
		document.body ? document.body.scrollTop : 0
	);
}
function f_filterResults(n_win, n_docel, n_body) {
	var n_result = n_win ? n_win : 0;
	if (n_docel && (!n_result || (n_result > n_docel)))
		n_result = n_docel;
	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}

var idZobrazeneNapovedy = '';
function napoveda (id) {
	var napovedy = document.getElementsByTagName ('div');
	for (var i in napovedy)
		if (napovedy[i] != null && (napovedy[i].className == 'napoveda' || napovedy[i].className == 'napoveda napovedaUObrazku'))
			napovedy[i].style.display = 'none';

	if (id != null) {
		idZobrazeneNapovedy = id;
 		var divSNapovedou = document.getElementById (id);
		divSNapovedou.style.display = 'block';
 	}
	else
		idZobrazeneNapovedy = '';
	
	posunNapovedy ();
	sirkaNapovedy ();
	
	return true;
}

function posunNapovedy () {
	if (idZobrazeneNapovedy != '') {
		var divSNapovedou = document.getElementById (idZobrazeneNapovedy);
		var okraje = 20;

		divSNapovedou.style.top = f_scrollTop () + okraje + 'px';
	}
}

function sirkaNapovedy () {
	if (idZobrazeneNapovedy != '') {
		var divSNapovedou = document.getElementById (idZobrazeneNapovedy);

		var sirkaStranky = 960; 
		var okraje = 20;
		var minimalniSirka = 200;
		var paddingDivuSOkrajem = 22;
		var sirka = Math.floor (((f_clientWidth () - sirkaStranky) / 2) - (okraje * 2) - paddingDivuSOkrajem);

//		alert (x +' ' + f_clientWidth () + ' ' + window.scrollbarWidth);

		if (sirka >= minimalniSirka) {
			divSNapovedou.style.position = 'absolute';
			divSNapovedou.style.left = okraje + 'px';
			divSNapovedou.style.width = sirka + 'px';
		}
		else {
			divSNapovedou.style.position = '';
			divSNapovedou.style.left = '';
			divSNapovedou.style.width = '';
		}
	}
}

function rychlostPocitace () {
	var t0 = new Date();
	for (var i = 0; i < 1000000; i++);
	var t1 = new Date();
	return t1 - t0;
}


//////////////
// neni nutne pouzivat
//
// function nactiWindowScrollbarVelikosti () {
// 	var i = document.createElement ('p');
// 	i.style.width = '100%';
// 	i.style.height = '200px';
// 	
// 	var o = document.createElement ('div');
// 	o.style.position = 'absolute';
// 	o.style.top = '0px';
// 	o.style.left = '0px';
// 	o.style.visibility = 'hidden';
// 	o.style.width = '200px';
// 	o.style.height = '150px';
// 	o.style.overflow = 'hidden';
// 	o.appendChild (i);
// 	
// 	document.body.appendChild (o);
// 	var w1 = i.offsetWidth;
// 	var	h1 = i.offsetHeight;
// 	o.style.overflow = 'scroll';
// 	var w2 = i.offsetWidth;
// 	var h2 = i.offsetHeight;
// 	if (w1 == w2) 
// 		w2 = o.clientWidth;
// 	if (h1 == h2) 
// 		h2 = o.clientWidth;
// 	
// 	document.body.removeChild (o);
// 	
// 	window.scrollbarWidth = w1 - w2;
// 	window.scrollbarHeight = h1 - h2;
// }