function escribirBotones(){
var txt='';
txt += '<table width="90%" border="0" cellspacing="5" cellpadding="0" align="center"><tr>';
txt += '<td width="86%">&nbsp;</td><td width="6%"><a href="index.html"><img src="img/botonEspanol.jpg" width="71" height="46" border=0></a></td>';
txt += '<td width="2%">&nbsp;</td><td align="right" width="6%"><a href="indexEnglish.html"><img src="img/botonIngles.jpg" width="71" height="46" border=0></td>';
txt += '</tr></table>';
document.write(txt);
}