// upload obrazków
if (document.images) {
    var MenuElements=["aktualnosci","oferta","o_firmie","portfolio","kontakt"];
    var MenuElementsOff=new Array();
    var MenuElementsOn=new Array();
    for (i=0;i<5;i++) {
        MenuElementsOff[i] = new Image();
        MenuElementsOff[i].src = "images/" + lang + "/menu_" + MenuElements[i] + "_a.gif";
        
        MenuElementsOn[i] = new Image();
        MenuElementsOn[i].src =  "images/" + lang + "/menu_" + MenuElements[i] + "_b.gif";
    }
}

function AnimujMenu(oElement,iReplacement,bMode)
{
    if (bMode == true) {
        MenuElementsOff[iReplacement].src=oElement.src;
        oElement.src=MenuElementsOn[iReplacement].src;
    } else {
        oElement.src=MenuElementsOff[iReplacement].src;
    }
}

function pokazSubmenu(option_id)
{
    var divId='divSubmenu'+option_id+'';
    var divSubmenu = document.getElementById(divId);
    if (divSubmenu.style.display == 'block') {
        divSubmenu.style.display = 'none';
    } else {
        divSubmenu.style.display = 'block';
    }
}

function przesunKropke(idObrazkow,aktywny)
{
    for (i=0;i<idObrazkow.length;i++) {
        document.getElementById(idObrazkow[i]).src='images/circle_empty.gif';
    }
    document.getElementById(idObrazkow[aktywny]).src='images/circle_filled.gif';
}