var pictureWindowLink = '/pics.php';

function OpenPicture(event) {
    //prevent following the link
    PreventDefault(event);

    var linkToPicture = GetTargetFrom(event).parentNode.href;
    var pictureWindow = window.open(pictureWindowLink+'?href='+linkToPicture, linkToPicture,
      'width=10,height=10,directories=no,fullscreen=no,location=no,scrollbars=no,resizable=yes,status=no,titlebar=no,toolbar=no');    
    
    pictureWindow.focus();
}

function AddOpenPictureEvents() {
    var links = document.getElementsByTagName('a');
    for(i in links) {
        if('popup' == links[i].className) {
            AddEventHandler(links[i], 'click', OpenPicture);
        }
    }
}

AddOnloadHandler(AddOpenPictureEvents);