function roll(img_name1, img_src1, img_name2, img_src2)
{
  document[img_name1].src = img_src1;
  document[img_name2].src = img_src2;
}

function showtext(n, p)
{
document.getElementById(n).style.display='block';
document.getElementById(p).style.display='block';
}

function hidetext(n, p)
{
document.getElementById(n).style.display='none';
document.getElementById(p).style.display='none';
}

function text_pos_and_disp(n, p)
{
document.getElementById(n).style.display='none';
document.getElementById(n).style.position='fixed';

document.getElementById(p).style.display='none';
document.getElementById(p).style.position='fixed';
}

function hide_videos(){
  var i=1;
  while(document.getElementById('v_'+i.toString())!=null){
    document.getElementById('v_'+i.toString()).style.display='none';
    i++;
  }
  document.getElementById('v_1').style.display='block';
}

function change_video(id){
  var i=1;
  while(document.getElementById('v_'+i.toString())!=null){
    document.getElementById('v_'+i.toString()).style.display='none';
    i++;
  }
  document.getElementById('v_'+id).style.display='block';  
}


function menu_preload(){
var image0n = new Image();
image0n.src = "site_img/menu/n/news.png";
var image0h = new Image();
image0h.src = "site_img/menu/h/news.png";

var image1n = new Image();
image1n.src = "site_img/menu/n/koncerty.png";
var image1h = new Image();
image1h.src = "site_img/menu/h/koncerty.png";

var image2n = new Image();
image2n.src = "site_img/menu/n/dlamediow.png";
var image2h = new Image();
image2h.src = "site_img/menu/h/dlamediow.png";

var image3n = new Image();
image3n.src = "site_img/menu/n/bio.png";
var image3h = new Image();
image3h.src = "site_img/menu/h/bio.png";

var image4n = new Image();
image4n.src = "site_img/menu/n/sklad.png";
var image4h = new Image();
image4h.src = "site_img/menu/h/sklad.png";

var image5n = new Image();
image5n.src = "site_img/menu/n/perla.png";
var image5h = new Image();
image5h.src = "site_img/menu/h/perla.png";

var image6n = new Image();
image6n.src = "site_img/menu/n/kamil.png";
var image6h = new Image();
image6h.src = "site_img/menu/h/kamil.png";

var image7n = new Image();
image7n.src = "site_img/menu/n/tomek.png";
var image7h = new Image();
image7h.src = "site_img/menu/h/tomek.png";

var image8n = new Image();
image8n.src = "site_img/menu/n/toper.png";
var image8h = new Image();
image8h.src = "site_img/menu/h/toper.png";

var image9n = new Image();
image9n.src = "site_img/menu/n/gajos.png";
var image9h = new Image();
image9h.src = "site_img/menu/h/gajos.png";

var image10n = new Image();
image10n.src = "site_img/menu/n/muzyka.png";
var image10h = new Image();
image10h.src = "site_img/menu/h/muzyka.png";

var image11n = new Image();
image11n.src = "site_img/menu/n/galeria.png";
var image11h = new Image();
image11h.src = "site_img/menu/h/galeria.png";

var image12n = new Image();
image12n.src = "site_img/menu/n/video.png";
var image12h = new Image();
image12h.src = "site_img/menu/h/video.png";

var image13n = new Image();
image13n.src = "site_img/menu/n/kontakt.png";
var image13h = new Image();
image13h.src = "site_img/menu/h/kontakt.png";

var image14n = new Image();
image14n.src = "site_img/menu/n/ksiega.png";
var image14h = new Image();
image14h.src = "site_img/menu/h/ksiega.png";

var image15n = new Image();
image15n.src = "site_img/menu/n/mailing.png";
var image15h = new Image();
image15h.src = "site_img/menu/h/mailing.png";

var image16n = new Image();
image16n.src = "site_img/menu/n/linki.png";
var image16h = new Image();
image16h.src = "site_img/menu/h/linki.png";

}