function popWin(URL, w, h, scroll) {
    if (scroll == null) scroll = 'yes';
    newWindow = window.open(URL, "newWin", "toolbar=no,location=no,status=no,menubar=no,scrollbars=" + scroll + ",width=" + w + ",height=" + h + ",resizable=no,screenx=100,screeny=60");   
}