function buttonChangeImage(anchor, image){
    var elements = anchor.getElementsByTagName('img');

    elements[0].src = image;
}

function submitForm(formID){
    var form = document.getElementById(formID);

    form.submit();
}

//Used on edit preferences screen:
function show(id){
    var element = document.getElementById(id);

    element.style.display = "block";
}
function hide(id){
    var element = document.getElementById(id);

    element.style.display = "none";
}
function toggle(id, defaultDisplay){
    var element = document.getElementById(id);

    if(element.style.display == '')
        element.style.display = defaultDisplay;
    if(element.style.display == 'block')
        element.style.display = "none";
    else if(element.style.display == 'none')
        element.style.display = "block";
}
function logoStateChanged(selector){
    switch(selector.value){
        case '1':
            hide("CustomLogoInput");
            break;
        case '2':
            hide("CustomLogoInput");
            break;
        case '3':
            show("CustomLogoInput");
            break;
    }
}

//Used by NROC courses:
function MM_openBrWindow(url, name, params){
    window.open(url, name, params);
}
function gotoSubChapter(param){
    //Ingore this call.  legacy
}