function showImage(photoId) {
    showDialog("/servlet/viewphoto?photoId=" + parseInt(photoId), 640, 480);
}

function showDialog(link, width, height) {
    var newWin = window.open(link,"newWin","height="+height+",width="+width+",left="+(screen.availWidth/2-width/2)+",top="+(screen.availHeight/2-height/2)+",status=no,toolbar=no,menubar=no,location=no, scrollbars=yes, resizable=yes");
    if (newWin) newWin.focus();
}