function OpenPopup(pageURL, title,w,h) 
{
    var left = (screen.width/2)-(w/2);
    var top = (screen.height/2)-(h/2);
    var targetWin = window.open (pageURL, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=no, copyhistory=no,width='+w+', height='+h+', top='+top+', left='+left);
    if (window.focus) {targetWin.focus();}
    return false;
}