function openPresentation(id) {
    handle = window.open("http://demo.recit.fi/rp/open/fi/" + id + "/index.html",
                         "recit_oktn",
                         'toolbar=no,location=no,scrollbars=no,width=1018,height=650,resizable=no,left=0,top=0');
}

function chimg(url) {
    oMainPicture = document.getElementById("bigpic");
    if (oMainPicture) oMainPicture.src = "images/" + url;
    return false;
}