function chsrc(img,action){
	if(action == 'over'){
		document.getElementById(img).src = './img/menu/'+img+'2.png';	
	}else{
		document.getElementById(img).src = './img/menu/'+img+'.png';	
	}
}

function confirmSubmit(){
	var agree=confirm("Opravdu vymazat?");
	if (agree)
	 	return true;
	else
		return false;
}

function hiderr(id){
	document.getElementById('error' + id).style.display = 'none';
}

function hidinfo(id){
	document.getElementById('info' + id).style.display = 'none';
}

function hideall(errs,infos){
	for(var i=0; i<errs; i++){
		document.getElementById('error'+i).style.display = 'none';
	}
	
	for(var i=0; i<infos; i++){
		document.getElementById('info'+i).style.display = 'none';
	}
	
	document.getElementById('err_switch').style.display = 'none';
}

function showChildren(id) {
	var ret = true;
	var x = 0;
	while (ret == true) {
		ret = setTimeout("processShow('" + id + "','block'," + x + ");", 300);
		x++;
	}	
}

function hideChildren(id) {
	var ret = true;
	var x = 0;
	while (ret == true) {
		setTimeout("processShow('" + id + "','none'," + x + ");", 1500);
		ret = false;
		x++;
	}	
}	
	
function processShow(id, how, sub) {	
	el = document.getElementById(id + '_'+sub);
	if (el) {
		el.style.display = how;
		return true;
	} else {
		return false;
	}
}