// swap active image in photo galleries
function swapImg(imgName) {
    if(document.getElementById) {
        if(imgName.href != '') {
            document.getElementById('galleryImg').src = imgName.href;
        }
        if(imgName.title != '' && document.getElementById('caption').childNodes[0].nodeValue != '') {
            document.getElementById('caption').childNodes[0].nodeValue = imgName.title;
        }
        return false;
    } else {
        return true;
    }
}