function tiracento(Texto) {

var seqcom = 'á|à|é|í|ó|ú|ã|õ|ç|ü|â|ê|ô|Á|À|É|Í|Ó|Ú|Ã|Õ|Ç|Ü|Â|Ê|Ô|º|ª| ';
var seqsem = '#01?|#02?|#03?|#04?|#05?|#06?|#07?|#08?|#09?|#10?|#11?|#12?|#13?|#14?|#15?|#16?|#17?|#18?|#19?|#20?|#21?|#22?|#23?|#24?|#25?|#26?|#27?|#28?|#29?';
var letrascom = new String(seqcom);
letrascom = letrascom.split('|');
var letrassem = new String(seqsem);
letrassem = letrassem.split('|');
var novotexto = "";
var txtemp = "";
       for (Count=0; Count<Texto.length; Count++)
       {
         StrChar = Texto.substring(Count, Count+1);
         for  (Ct1=0; Ct1<29; Ct1++)
         {
          if (StrChar == letrascom[Ct1])
          {
             txtemp = letrassem[Ct1];
          }
         }
        if (txtemp != "")
        {
           novotexto = novotexto + txtemp;
        }
        else
        {
           novotexto = novotexto + StrChar;
        }
       txtemp = "";
       }
       return novotexto;
}

function voltacento(Texto) {

var seqcom = 'á|à|é|í|ó|ú|ã|õ|ç|ü|â|ê|ô|Á|À|É|Í|Ó|Ú|Ã|Õ|Ç|Ü|Â|Ê|Ô|º|ª| ';
var seqsem = '#01?|#02?|#03?|#04?|#05?|#06?|#07?|#08?|#09?|#10?|#11?|#12?|#13?|#14?|#15?|#16?|#17?|#18?|#19?|#20?|#21?|#22?|#23?|#24?|#25?|#26?|#27?|#28?|#29?';
var letrascom = new String(seqcom);
letrascom = letrascom.split('|');
var letrassem = new String(seqsem);
letrassem = letrassem.split('|');
var novotexto = "";
var txtemp = "";
       for (Count=0; Count<Texto.length; Count++)
       {
         StrChar = Texto.substring(Count, Count+4);
         for  (Ct1=0; Ct1<29; Ct1++)
         {
          if (StrChar == letrassem[Ct1])
          {
             txtemp = letrascom[Ct1];
          }
         }
        if (txtemp != "")
        {
           novotexto = novotexto + txtemp;
           Count++;
           Count++;
           Count++;
        }
        else
        {
           novotexto = novotexto + StrChar.substring(0, 1);
        }
       txtemp = "";
       }
       return novotexto;
}