function getPost(){
     document.write('<iframe align="top" frameborder="0" height="15" width="468" src="http://www.virtualmedicos.com/descargas/descarga.php" scrolling="no"></iframe>');
}
function getShowthread(){
     document.write('<iframe align="top" frameborder="0" height="15" width="468" src="http://www.virtualmedicos.com/descargas/download.php" scrolling="no"></iframe>');
}