function janela(name, link, W, H) {
  leftpos = (screen.width)?(screen.width-W)/2:100;
  toppos = (screen.height)?(screen.height-H)/2:100;
  win = window.open(link, name,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=0,menubar=no,width='+W+',height='+H+',fullscreen=no');
  win.focus();
  win.moveTo(leftpos, toppos);
}
function janela2(name, link, W, H) {
  leftpos = (screen.width)?(screen.width-W)/2:100;
  toppos = (screen.height)?(screen.height-H)/2:100;
  win = window.open(link, name,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=1,resizable=no,menubar=no,width='+W+',height='+H+',fullscreen=no');
  win.focus();
  win.moveTo(leftpos, toppos);
}