function navToggle(sender)
{
    if (sender.parentNode.className.search('expand') != -1) {
        sender.parentNode.className = sender.parentNode.className.replace(/expand/, 'collapse');
        sender.innerHTML = '-';
    } else if (sender.parentNode.className.search('collapse') != -1) {
        sender.parentNode.className = sender.parentNode.className.replace(/collapse/, 'expand');
        sender.innerHTML = '+';
    }
    sender.blur();
}

function bookmark() {
    if ((navigator.appName == 'Microsoft Internet Explorer') && (parseInt(navigator.appVersion) >= 4)) {
        window.external.AddFavorite(document.URL ,document.title);
    } else if (navigator.appName == 'Netscape') {
        window.sidebar.addPanel(document.title, document.URL, '');
    } else {
        alert('Gebruik Ctrl-D (Internet Explorer / Firefox) of gebruik het menu van uw browser om de pagina aan de favorieten toe te voegen');
    }
}

function printpage() {
	var url = document.location.protocol + '//' + document.location.host + document.location.pathname + '?output=print';
	window.open(url, '_blank', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=1,resizable=1,width=600,height=600');
}