function toggleQR() {
    var el = document.getElementById('qrpopup');
    var el2 = document.getElementById('qrmini');
    
    if (el.style.display == 'none') {
        el.getElementsByTagName('img')[0].src = 'http://chart.apis.google.com/chart?cht=qr&chs=150x150&chl=' + encodeURIComponent(top.location.href) + '&chld=H|0';
        el.style.display = 'block';
        el.style.top = el2.offsetTop;
    } else {
        el.getElementsByTagName('img')[0].src = 'images/bug.png';
        el.style.display = 'none';
    }
}

function showQR(el2) {
    var el = document.getElementById('qrpopup');
    el.getElementsByTagName('img')[0].src = 'http://chart.apis.google.com/chart?cht=qr&chs=150x150&chl=' + encodeURIComponent(top.location.href) + '&chld=H|0';
    el.style.top = (parseInt(el2.offsetTop) - 50) + 'px';
    el.style.left = (parseInt(el2.offsetLeft) - 182) + 'px';
    el.style.display = 'block';
}

function hideQR() {
    var el = document.getElementById('qrpopup');
    el.getElementsByTagName('img')[0].src = 'images/bug.png';
    el.style.display = 'none';
}