function setTitle(image) {
    if (top.frames["header"]) {
        if (document.layers) {
            top.frames["header"].document.layers["header"].document.images["imageHeader"].src = "gfx/" + image;
        } else {
            top.frames["header"].document.images["imageHeader"].src = "gfx/" + image;
        }
    }
} 

function doSomethingCool(obj) {
    extra = document.forms[0].elements["extra"];
    if (document.getElementById || document.all) {
        val = obj.options[obj.selectedIndex].value;
        if (val == "Een link op een andere pagina") {
            // getObj("extraText").innerHTML = "Naam andere pagina";
            // getObj("extraRow").style.display = "block";
            extra.value     = "Naam andere pagina";
            extra.disabled  = false;
            extra.focus();
        } else if (val == "Een tijdschrift") {
            // getObj("extraText").innerHTML = "Naam tijdschrift";
            // getObj("extraRow").style.display = "block";
            extra.value     = "Naam tijdschrift";
            extra.disabled  = false;
            extra.focus();
        } else if (val = "Overig") {
            extra.value     = "Overig";
            extra.disabled  = false;
            extra.focus();
        } else {
            // getObj("extraRow").style.display = "none";
            extra.value = "-";
            extra.disabled = true;
        }
    }
}

function doSomethingWicked(obj) {
    anders = document.forms[0].elements["anders"];
    if (document.getElementById || document.all) {
        val = obj.options[obj.selectedIndex].value;
        if (val == "Anders, nl.:") {
            // getObj("extraText").innerHTML = "Naam andere pagina";
            // getObj("extraRow").style.display = "block";
            anders.value     = "Anders, namelijk...";
            anders.disabled  = false;
            anders.focus();
        } else {
            // getObj("extraRow").style.display = "none";
            anders.value = "-";
            anders.disabled = true;
        }
    }
}

function getObj(id) {
    if (document.getElementById) return document.getElementById(id);
    else if (document.all)       return document.all[id];
}