function potvrdit(hlaska) {
	var ret = confirm(hlaska);
	if (ret)
		return true;
	else
		return false;
}
function getElementsByClassName(classname,tag) {
if(!tag) tag = "*";
var anchs =  document.getElementsByTagName(tag);
var total_anchs = anchs.length;
var regexp = new RegExp('\\b' + classname + '\\b');
var class_items = new Array()

for(var i=0;i<total_anchs;i++) { //Go thru all the links seaching for the class name
		var this_item = anchs[i];
		if(regexp.test(this_item.className)) {
			class_items.push(this_item);
		}
	}
	return class_items;
}
function nastavActive(elm,podmenu_id)
{
	var menu;
	menu = getElementsByClassName('menu_obrazek');
	for (var i=0; i < menu.length; i++) {
		menu[i].className += "_active";
	}
	var podmenu;
	podmenu = getElementsByClassName('menu_podmenu');
	for (var i=0; i < podmenu.length; i++) {
		podmenu[i].style.display = 'none';
	}
	document.getElementById(podmenu_id).style.display = 'block';
	elm.className = elm.className.replace('_active','');
}
function nastavPassive(elm,podmenu_id)
{
	document.getElementById(podmenu_id).style.display = 'none';
	var menu;
	menu = getElementsByClassName('menu_obrazek');
	for (var i=0; i < menu.length; i++) {
		menu[i].className += "_active";
	}
	podmenu = getElementsByClassName('menu_podpodmenu');
	for (var i=0; i < podmenu.length; i++) {
		podmenu[i].style.display = 'none';
	}
	sipky = getElementsByClassName('sipka');
	for (var i=0; i < sipky.length; i++) {
		sipky[i].src = 'http://' + top.location.host + '/images/sipka.gif';
	}
}
function togglePodKategorie(id)
{
	if(document.getElementById(id).style.display != 'block')
		zobrazit = true;
	else zobrazit = false;

	podmenu = getElementsByClassName('menu_podpodmenu');
	for (var i=0; i < podmenu.length; i++) {
		podmenu[i].style.display = 'none';
	}
	if(zobrazit == true)
		document.getElementById(id).style.display = 'block';
	else document.getElementById(id).style.display = 'none';

	sipky = getElementsByClassName('sipka');
	for (var i=0; i < sipky.length; i++) {
		sipky[i].src = 'http://' + top.location.host + '/images/sipka.gif';
	}
	if(zobrazit == true)
		document.getElementById(id + '_sipka').src = 'http://' + top.location.host + '/images/sipkad.gif';
	else document.getElementById(id + '_sipka').src = 'http://' + top.location.host + '/images/sipka.gif';
}

//function jQuery(v) { return(document.getElementById(v)); }

function vyberCheckboxy() {
	jQuery('input.fVse').click(function() {
		x = this.checked;
		jQuery('input.fJed').each(function() {
			this.checked = x ? true : false;
			jQuery(this).parents('tr')[x ? 'addClass' : 'removeClass']('vybrany');
		})
	});
	jQuery('input.fJed').parents('tr').click(function(e) {
		iCheck = e.target.className == 'fJed' ? 1 : 0;

		jQuery(this).children('td').children('.fJed').each(function() {
			if (iCheck)
				c = this.checked;
			else
				c = this.checked = !this.checked;
		});
		jQuery(this)[c ? 'addClass' : 'removeClass']('vybrany');

		iPoc = jQuery('input.fJed').length;
		iZap = jQuery('input.fJed:checked').length;
		if (iZap == iPoc || !iZap)
			jQuery('input.fVse').attr('checked', iZap);
	});
}
function toggleById(id)
{
	if(document.getElementById(id).style.display != 'block')
		zobrazit = true;
	else zobrazit = false;

	if(zobrazit == true)
		document.getElementById(id).style.display = 'block';
	else document.getElementById(id).style.display = 'none';
}