var previousZalozka = 1;

function aktivni_zalozka(id)
{
        if(previousZalozka)
        {
            neaktivni_zalozka(previousZalozka);
        }
        
        document.getElementById('zal-' + id).className = 'zalozka-aktivni';
        
        previousZalozka = id;
/*
    try
    {
        if(previousZalozka)
        {
            neaktivni_zalozka(previousSmallTab);
        }
        
        document.getElementById('zal-' + id).className = 'zalozka-aktivni';
        
        previousZalozka = id;
    }
    catch(e) {}
*/    
}

function neaktivni_zalozka(id)
{
    try
    {
        document.getElementById('zal-' + id).className = 'zalozka';
    }
    catch(e) {}
}

function detail_zalozka_popis(product_id, language_id)
{
  zalozky_ajax('ajax_detail_produkt_popis.php?products_id=' + product_id + '&language_id=' + language_id, 'productDescription')
}

function detail_zalozka_navod(product_id)
{
  zalozky_ajax('ajax_detail_produkt_navod.php?products_id=' + product_id, 'productDescription')

}


function detail_zalozka_diskuze(product_id, review_url)
{
  zalozky_ajax('ajax_detail_produkt_diskuze.php?products_id=' + product_id + '&review_url='+review_url, 'productDescription')

}


function detail_zalozka_na_splatky(product_id)
{
  zalozky_ajax('ajax_detail_produkt_na_splatky.php?products_id=' + product_id+'&kalk=ano', 'productDescription')

}



// JavaScript Document
  //============================================================================
  //popis: ajax
  //============================================================================
function zalozky_ajax(stranka, kam)
{

    var httpRequest;
    
    if(typeof window.ActiveXObject != 'undefined')
    {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {  
        httpRequest = new XMLHttpRequest();
    }
    httpRequest.open("GET", stranka, true);
    httpRequest.onreadystatechange= function () 
    {
        processRequest(httpRequest, kam) 
    };
    httpRequest.send(null);
}


function processRequest(httpRequest, kam) 
{
    if (httpRequest.readyState == 4)
    {
        if(httpRequest.status == 200)
        {
            if (typeof kam == 'string') 
            {
                document.getElementById(kam).innerHTML = httpRequest.responseText;
            }
            if (typeof kam == 'function') 
            {
                kam(httpRequest.responseText);
            }
        }
        else
        {
            alert("Chyba pri nacitani stanky " + httpRequest.status +" : "+ httpRequest.statusText);
        }
    }
    else
    {
        if (typeof kam == 'string' && kam != '') 
        {
            document.getElementById(kam).innerHTML = 'PRACUJI...PROSÍM ČEKEJTE<br>';
            
        }
    }
       
}