function WO (url, width, height) {
  var left = (screen.width/2) - width/2;
  var top = (screen.height/2) - height/2;
  var desc='left='+left+',top='+top+',width='+width+',height='+height+',directories=no,location=no,resizable=no,scrollbars=no,status=0,toolbar=no,menubar=no,head=no';
  myWin= open(url, '' , desc);
}