var popupWindow = null;

function popup(url,width,height) {
        var top  = (screen.height - height) / 2;
        var left = (screen.width  - width)  / 2;
    popupWindow = window.open(url,'popupwindow','toolbar=no,menubar=no,scrollbars=yes,resizable=no,width='+width+',height='+height+',top='+top+',left='+left+'');
        popupWindow.focus();
}

function a_photos(url,p1,p2)
{
window.open(url,p1,p2);
}