function openWin(sHref, width, height) {
  xPos = (screen.width - width) / 2;
  yPos = (screen.height - height) / 2;
  cm = window.open(sHref, '', 'width=' + width + ',height=' + height + ',scrollbars,!menubar,resizable,status,left=' + xPos + ',top=' + yPos);
  cm.focus();
}