var napoveda = function () {
	this.idZobrazeneNapovedy = '';
	this.sirkaStranky = 960;
	this.okraje = 20;
	this.minimalniSirka = 200;
	this.paddingDivuSOkrajem = 22;

	var objekt = this;
	window.onscroll = function () {
		objekt.posun ();	
	}
	window.onresize = function () {
		objekt.sirka ();	
	}

	this.zobraz = function (id) {
		var napovedy = document.getElementsByTagName ('div');
	  for (var i = 0; i < napovedy.length; i++)
			if (napovedy[i] != null && (napovedy[i].className == 'napoveda' || napovedy[i].className == 'napoveda napovedaUObrazku'))
				napovedy[i].style.display = 'none';
	
		if (id != null) {
			var divSNapovedou = document.getElementById (id);
			//osetreni, hlavne pro kategorieIdPridej, kde to je vzdy i kdyz se napoveda nepouziva
			if (divSNapovedou != null) {
				this.idZobrazeneNapovedy = id;
				divSNapovedou.style.display = 'block';
			}
			else
				this.idZobrazeneNapovedy = '';
	 	}
		else
			this.idZobrazeneNapovedy = '';
		
		this.posun ();
		this.sirka ();
		
		return true;
	}
	
	this.posun = function () {
		if (this.idZobrazeneNapovedy != '') {
			var divSNapovedou = document.getElementById (this.idZobrazeneNapovedy);
			divSNapovedou.style.top = f_scrollTop () + this.okraje + 'px';
		}
		
		return true;
	}
	
	this.sirka  = function () {
		if (this.idZobrazeneNapovedy != '') {
			var divSNapovedou = document.getElementById (this.idZobrazeneNapovedy);
			var sirka = Math.floor (((f_clientWidth () - this.sirkaStranky) / 2) - (this.okraje * 2) - this.paddingDivuSOkrajem);
	
			if (sirka >= this.minimalniSirka) {
				divSNapovedou.style.position = 'absolute';
				divSNapovedou.style.left = this.okraje + 'px';
				divSNapovedou.style.width = sirka + 'px';
			}
			else {
				divSNapovedou.style.position = '';
				divSNapovedou.style.left = '';
				divSNapovedou.style.width = '';
			}
		}
		
		return true;
	}
}

var zaneprazdneno = function () {
	//this.pocetZobrazeni = 0;

	this.zaneprazdnenoDiv = document.createElement ('div');
	this.zaneprazdnenoDiv.style.position = 'fixed';
	this.zaneprazdnenoDiv.style.top = '50%'; 
	this.zaneprazdnenoDiv.style.background = '#888 url(/adminGrafika/ajax-loader.gif) no-repeat center 40px'; 
	this.zaneprazdnenoDiv.style.textAlign = 'left'; 
	this.zaneprazdnenoDiv.style.width = '300px'; 
	this.zaneprazdnenoDiv.style.height = '100px'; 
	this.zaneprazdnenoDiv.style.border = '1px solid #000'; 
	this.zaneprazdnenoDiv.style.color = '#fff'; 
	this.zaneprazdnenoDiv.style.fontWeight = 'bold'; 
	this.zaneprazdnenoDiv.style.opacity = '0.80'; 
	this.zaneprazdnenoDiv.style.filter = 'alpha(opacity=80)'; 
	this.zaneprazdnenoDiv.style._position = 'absolute'; 
	this.zaneprazdnenoDiv.style._top = 'expression(0+body.scrollTop);';
	this.zaneprazdnenoDiv.style.visibility = 'hidden';
	var objekt = this;
  this.zaneprazdnenoDiv.onmouseover = function () {
		if (objekt.zaneprazdnenoDiv.style.top == '50%') 
			objekt.zaneprazdnenoDiv.style.top = '30%';
		else
			objekt.zaneprazdnenoDiv.style.top = '50%';
  }
	document.body.appendChild(this.zaneprazdnenoDiv);
  
  this.zobraz = function () {
		//this.pocetZobrazeni++;
		
		//<div id="zaneprazdneno" class="zaneprazdneno" onmouseover="javascript: zaneprazdneno.presun();">{$texty->preloz ('Čekejte...')}</div>
		var scrolledX, scrolledY; 
		if (self.pageYoffset) { 
			scrolledX = self.pageXoffset; 
			scrolledY = self.pageYoffset; 
		} else if (document.documentElement && document.documentElement.scrollTop) { 
			scrolledX = document.documentElement.scrollLeft; 
			scrolledY = document.documentElement.scrollTop; 
		} else if (document.body) { 
			scrolledX = document.body.scrollLeft; 
			scrolledY = document.body.scrollTop; 
		} 
		
		var centerX, centerY; 
		if (self.innerHeight) { 
			centerX = self.innerWidth; 
			centerY = self.innerHeight; 
		} else if (document.documentElement && document.documentElement.clientHeight) { 
			centerX = document.documentElement.clientWidth; 
			centerY = document.documentElement.clientHeight; 
		} else if (document.body) { 
			centerX = document.body.clientWidth; 
			centerY = document.body.clientHeight; 
		} 
		
		var leftoffset = scrolledX + (centerX - this.zaneprazdnenoDiv.offsetWidth) / 2; 
		var topoffset = scrolledY + (centerY - this.zaneprazdnenoDiv.offsetHeight) / 2; 
		
		//this.zaneprazdnenoDiv.style.top = topoffset + 'px'; 
		this.zaneprazdnenoDiv.style.left = leftoffset + 'px'; 

		this.zaneprazdnenoDiv.style.visibility = 'visible';
  }

  this.skryj = function () {
  	//this.pocetZobrazeni--;
  	//if (this.pocetZobrazeni == 0)
		this.zaneprazdnenoDiv.style.visibility = 'hidden';
//			this.zaneprazdnenoDiv.parentNode.removeChild (this.zaneprazdnenoDiv);
  }
}

// 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;
}

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;
// }