function PRO_openPopupWindow(theURL, winName, intWidth, intHeight, features, centralise) {
  features = features + ",width=" + intWidth + ",height=" + intHeight;

  if (centralise == "yes") {
    var intAvailWidth = 640, intAvailHeight = 480;
    var intMargin = 10;
    var intTop = intMargin, intLeft = intMargin;
    if (typeof(screen) == "object") {
      intAvailWidth = screen.availWidth;
      intAvailHeight = screen.availHeight;
    }
    intTop = Math.round(intAvailHeight/2 - intHeight/2);
    if (intTop < intMargin) intTop = intMargin;
    intLeft = Math.round(intAvailWidth/2 - intWidth/2);
    if (intLeft < intMargin) intLeft = intMargin;
    features = features + ",left=" + intLeft + ",top=" + intTop;
  }
		 
  var newWin = window.open(theURL,winName,features);
  newWin.focus();
  return false;
}