function nav(target)
{
    if(document.getElementById)
    {
        //var screens = document.getElementById("screens");
        var divs = document.getElementById("screens").getElementsByTagName("div");

        for (var i = 0; i < divs.length; i++)
        {
            id = divs[i].getAttribute("id");

            if (id == target)
                divs[i].style.display = "block";

            else
                divs[i].style.display = "none";
        }

    }
}

function gal(target,photo)
{
    if(document.getElementById)
    {
        nav(target);

        //var screens = document.getElementById(target);
        var divs = document.getElementById(target).getElementsByTagName("p");

        for (var i = 0; i < divs.length; i++)
        {
            if (divs[i].getAttribute('class') == 'photo')
                divs[i].style.display = "none";
        }

        var photos = document.getElementById(photo);
        photos.style.display = "block";

    }
}

// Operacje wykonywane po zaladowaniu strony
function init()
{
    
    // Dodawanie onclick do wybranych linkow
    var photos = document.getElementsByTagName('a');

    for(i=0; i < photos.length; i++)
    {
        var re = 'enlarge';
        var string = photos[i].className;
        if ( string.match(re))
        //if ((photos[i].href+'').match(/\.(jpe?g|png|gif)/i))
        {
            photos[i].onclick = function() {OpenWindow(this.href + '&js=1'); return false;}
        }
    }

}

// Otwieranie nowego okienka z parametrami
function OpenWindow(url)
{
    var Okno = window.open(url, "OpenWindow", 'width=200,height=100,top=0,left=0,resizable=0,scrollbars=no,menubar=no,status=no');

}

window.onload = function()
{
  init();
}