function Legal(){

  var anchosc=window.screen.availWidth;
  var altosc=window.screen.availHeight;
  var sWidth=400;
  var sHeight=400;

  window.open ('/legal.html', 'legal', 'left='+((anchosc/2)-parseInt(sWidth)/2)+',top='+((altosc/2)-parseInt(sHeight)/2)+',toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes,width=' + sWidth + ',height=' + sHeight + '');

}