function openPage (url, wwidth, wheight, title, scroll, size) {
  ns4 = (document.layers)? true:false
  var scrolling = ',scrollbars=' + scroll;
  var sizing = ',resizable=' + size;
  if (ns4) wheight = parseInt(wheight) + 30;
  leftpos = (screen.width) ? (screen.width-wwidth)/2 : 0;
  toppos = (screen.height) ? (screen.height-wheight)/2 : 0;
  opts = 'width=' + wwidth + ',height=' + wheight + scrolling + sizing + ',top=' + toppos + ',screenY=' + toppos + ',left=' + leftpos + ',screenX=' + leftpos + ',';
  popupWin = window.open(url, title, opts);
}