function SetImageOffset(offset)
{
    var a = document.getElementById(Afbeeldingen_Id);

    if (a == null) return;

    if (a.CurrentImageIndex == null) 
    {
        a.CurrentImageIndex = 0;
    }

    a.CurrentImageIndex = a.CurrentImageIndex + offset;

    var b = Media_Afbeeldingen;

    if (a.CurrentImageIndex<0) a.CurrentImageIndex = 0;
    if (a.CurrentImageIndex>=b.length-1) a.CurrentImageIndex = b.length - 1;

    if (a.src != b[a.CurrentImageIndex])
    {
        a.src = b[a.CurrentImageIndex];
    }

    var btnNext = $(VorigButton_Id);//.childNodes[0];
    var btnPrev = $(VolgendButton_Id);//.childNodes[0];

    btnNext.src = btnNext.src.replace("_d.png",".png");
    btnPrev.src = btnPrev.src.replace("_d.png",".png");

    if (a.CurrentImageIndex == 0)
    {
        btnPrev.src = btnPrev.src.replace(".png","_d.png");
    }
    else if (a.CurrentImageIndex == Media_Afbeeldingen.length - 1)
    {    
        btnNext.src = btnNext.src.replace(".png","_d.png");
    }
}

function DisplaySwf(url)
{
    var iFrameSwf = document.getElementById("iFrameSwf");
    var afbeelding = document.getElementById(Afbeeldingen_Id);

    afbeelding.style.display = "none";
    iFrameSwf.style.display = "block";

    iFrameSwf.src = url;
}