function checkCR(evt) {
	var evt  = (evt) ? evt : ((event) ? event : null);
	var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
	if ((evt.keyCode == 13) && (node.type=="text")) {return false;}
}
function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadimg() { //v3.0
 var d=document; if(d.img){ if(!d.MM_p) d.MM_p=new Array();
   var i,j=d.MM_p.length,a=MM_preloadimg.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function upozorni(naco) {
  var navrat=false;
  if (alert(naco)) {
    navrat=true;
  }
  return navrat;
}

function sn(id,affect){
/*
var con=nov.getElementsByTagName("div");
var imag=nov.getElementsByTagName("img");
*/
if (affect==1) {
var text=document.getElementById(id);
if(text.style.display=="block"){
text.style.display="none";
//imag[0].src="images/plus.png";
}else{
text.style.display="block";
//imag[0].src="images/minus.png";
}
}
}

function go_to(url) {
	document.location.href=url;
}
function over(co) {
  var navrat=false;
  if (confirm('Opravdu chcete '+co+'?')) {
    navrat=true;
  }
  return navrat;
}

function over_custom(co) {
  var navrat=false;
  if (confirm(co)) {
    navrat=true;
  }
  return navrat;
}

function over_prejdi(txt,kam) {
	if (over(txt)) {
		document.location.href=kam;
	}
	return false; 
}
function kontrola() 
{
var a = document.getElementById('jmeno').value;
if (a=="") {
	window.alert("Prosíme vyplňte jméno"); 
	document.getElementById('jmeno').focus();
	return false; 
}
var a = document.getElementById('prijmeni').value;
if (a=="") {
	window.alert("Prosíme vyplňte příjmení"); 
	document.getElementById('prijmeni').focus();
	return false; 
}

var a = document.getElementById('email').value;
if (a=="") {
	window.alert("Prosíme o vyplnění kontaktního emailu"); 
	document.getElementById('email').focus();
	return false; 
} 
else return true; 
}