function videoamerica()
{
window.open('video_amer.html', 'muestraVentana',
'width=320, height=320, menubar=no, toolbar=no, location=no, scrollbars=no, resizable=no')
}
function videorpp()
{
window.open('video_rpp.html', 'muestraVentana',
'width=320, height=320, menubar=no, toolbar=no, location=no, scrollbars=no, resizable=no')
}