function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.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 MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_findObj(n, d) { //v4.0
  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);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_showHideLayers() { //v3.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}
var IdTime;
function chHiddenMenu(chID,pID){
     window.clearTimeout(IdTime);
      IdTime=null;
      for (id=1; id<=29; id++){
        if (document.all("ch"+id) != null){
          if(id > pID && id != chID){document.all["ch"+id].style.visibility = "hidden";}
        }
      }
}

function openElement(id) {
	object = document.getElementById(id);
	if(object.style.display == "block") {
		object.style.display = "none";
	} else {
		object.style.display = "block";
	}
}



   function zkontroluj(formular)
{

 if (formular.jmeno.value=="")
    {
        alert("Vyplňte prosím Vaše jméno a příjmení");
        formular.jmeno.focus();
        return false;
    }
	
	else if (formular.ulice.value=="")
    {
        alert("Vyplňte prosím ulici a číslo popisné");
        formular.ulice.focus();
        return false;
    }
	
	else if (formular.mesto.value=="")
    {
        alert("Vyplňte prosím město");
        formular.mesto.focus();
        return false;
    }
	
	else if (formular.psc.value=="")
    {
        alert("Vyplňte prosím poštovní směrovací číslo");
        formular.psc.focus();
        return false;
    }
	
	else if (formular.telefon.value=="")
    {
        alert("Vyplňte prosím kontaktní telefon");
        formular.telefon.focus();
        return false;
    }
	
	else if (formular.email.value=="")
    {
        alert("Vyplňte prosím e-mail.");
        formular.email.focus();
        return false;
    }
	
	else if (window.RegExp)
    {
        re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$");
        if (!re.test(formular.email.value))
        {
            alert("Uvedený formát emailu není správný");
            formular.email.focus();
            return false;
        }
		}
		
		else if (formular.pocet_dospeli.value=="")
    {
        alert("Vyplňte prosím počet dospělích osob.");
        formular.pocet_dospeli.focus();
        return false;
    }
		
	
	    else 
        return true;
}


function zkontroluj_en(formular)
{

 if (formular.jmeno.value=="")
    {
        alert("Please enter your name and surname");
        formular.jmeno.focus();
        return false;
    }
	
	else if (formular.ulice.value=="")
    {
        alert("Please enter your street and house number");
        formular.ulice.focus();
        return false;
    }
	
	else if (formular.mesto.value=="")
    {
        alert("Please enter city");
        formular.mesto.focus();
        return false;
    }
	
	else if (formular.psc.value=="")
    {
        alert("Please enter ZIP code");
        formular.psc.focus();
        return false;
    }
	
	else if (formular.telefon.value=="")
    {
        alert("Please enter your phone number");
        formular.telefon.focus();
        return false;
    }
	
	else if (formular.email.value=="")
    {
        alert("Please enter your e-mail.");
        formular.email.focus();
        return false;
    }
	
	else if (window.RegExp)
    {
        re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$");
        if (!re.test(formular.email.value))
        {
            alert("Please enter valid e-mail");
            formular.email.focus();
            return false;
        }
		}
		
		else if (formular.pocet_dospeli.value=="")
    {
        alert("Please entery number of adults");
        formular.pocet_dospeli.focus();
        return false;
    }
		
	
	    else 
        return true;
}