function toggleCategory(id, sender)
{
    var tmp_oCategory = document.getElementById(id);
    var tmp_bHide = tmp_oCategory.style.display != "none";
    tmp_oCategory.style.display = (tmp_bHide ? "none" : "");
    
    sender.className = (tmp_bHide ? "QCursusAanbodExpand" : "QCursusAanbodCollapse");
    
    return false;
}

function initializePage()
{
    try {document.execCommand("BackgroundImageCache",false,true); }
    catch (e) {}
}