var mg_poprz = mg2_poprz = "";

function f_start()
{
  //document.getElementById('belka').style.visibility = "visible";
  if(document.getElementById('slide_gal0'))
    document.getElementById('slide_gal0').style.display = 'none';
  if(document.getElementById('slide_gal'))
    document.getElementById('slide_gal').style.display = 'block';
  if(document.getElementById('gal'))
    document.getElementById('gal').style.display = 'block';

  if( document.getElementById('div_gal_pocz') )
  {

    var SzerokoscMarg = (screen.width - 922) / 2;
    var GaleriaTop = document.getElementById('div_gal_pocz').offsetTop;
    var GaleriaBottom = document.getElementById('div_gal_kon').offsetTop;
    var Wysokosc = GaleriaBottom - GaleriaTop;
    var EkranSzer = screen.width;

    DIV_tlo = document.getElementById('div_gal_tlo');
    DIV_tlo.style.display = "block";
    DIV_tlo.style.left = (922 - EkranSzer) / 2 + "px";
    DIV_tlo.style.top = GaleriaTop + "px";
    DIV_tlo.style.width = SzerokoscMarg + "px";
    DIV_tlo.style.height = Wysokosc + "px";

    DIV_tlo2 = document.getElementById('div_gal_tlo2');
    DIV_tlo2.style.display = "block";
    DIV_tlo2.style.left = 660 + "px";
    DIV_tlo2.style.top = GaleriaTop + "px";
    DIV_tlo2.style.width = 246 + SzerokoscMarg + "px";
    DIV_tlo2.style.height = Wysokosc + "px";
  }

}

function pokaz_tlo(ImgSrc)
{
  var StyleTlo = "url('images/"+ImgSrc+"')";
  if( document.getElementById('strona_margl') )
    document.getElementById('strona_margl').style.backgroundImage = StyleTlo;
  if( document.getElementById('strona_srodek') )
    document.getElementById('strona_srodek').style.backgroundImage = StyleTlo;
  if( document.getElementById('strona_margp') )
    document.getElementById('strona_margp').style.backgroundImage = StyleTlo;
}


////////////////////////

function menuOver(Id)
{
  if( document.getElementById(Id) )
  {
    document.getElementById(Id).style.backgroundColor = "#0092d3";
    document.getElementById(Id).style.color = "white";
  }
}
function menuOut(Id)
{
  if( document.getElementById(Id) )
  {
    document.getElementById(Id).style.backgroundColor = "#8cdaef";
    document.getElementById(Id).style.color = "#003763";
  }
}
//function menu2Out(Id)
//{
//  if( document.getElementById(Id) )
//  {
//    document.getElementById(Id).style.backgroundColor = "#dceff0";
//    document.getElementById(Id).style.color = "#003763";
//  }
//}


function mg_ukryj(Id)
{
  if( (Id!="") && (document.getElementById(Id)) )
  {
    var TD = document.getElementById("td_"+Id);
    TD.style.backgroundImage = "url('images/menus.jpg')";
    TD.style.backgroundPosition = "bottom right";

    document.getElementById(Id).style.display = "none";
    document.getElementById("div0_"+Id).style.display = "none";
  }
}

function mg_pokaz(Id)
{
  mg_ukryj(mg_poprz);
  mg_poprz = Id;
  if( (Id!="") && (document.getElementById(Id)) )
  {
    document.getElementById(Id).style.display = "block";
    document.getElementById("div0_"+Id).style.display = "block";

    var TD = document.getElementById("td_"+Id);
    TD.style.backgroundImage = "url('images/menus_wyb.jpg')";
    TD.style.backgroundPosition = "bottom center";
  }
}

////////////////////

//function mg2_ukryj(Id)
//{
//  if( (Id!="") && (document.getElementById(Id)) )
//  {
//    document.getElementById(Id).style.display = "none";
//  }
//}
//
//function mg2_pokaz(Id)
//{
//  mg2_ukryj(mg2_poprz);
//  mg2_poprz = Id;
//  if( (Id!="") && (document.getElementById(Id)) )
//  {
//    document.getElementById(Id).style.display = "block";
//    document.getElementById(Id).style.top = "4px";
//    document.getElementById(Id).style.left = "100px";
//  }
//}


///////////////////////////