// Make Popup Windows
function popup (url, windowName, w, h,  r, st, s, l, m, t, left, top) {
  try {
    win.close();
  } catch(e) {    
  }
  h = parseFloat(h) + 15;
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  if (left != "center") winl = left;
  if (top  != "center") wint = top;
  win = window.open (url, windowName, "height=" +h+ ", width=" +w+ ", resizable=" +r+ ", status= " +st+ ", scrollbars=" +s+ ", location=" +l+ ", menubar=" +m+  ", toolbar= " +t+ ", left="+winl+", top="+wint);
  win.focus();    
}