/**
 * Popup window.
 */
function window_open (src, width, height) {
    var left = (screen.availWidth / 2) - (width / 2);
    var top = (screen.availHeight / 2) - (height / 2);

    info = window.open(src,'photo','resizable=1, scrollbars=0, toolbar=0, width='+width+', height='+height+' status=0, left='+left+', top='+top);
    info.focus();
}