function formataCPF(e)
{
      var code;
      if (!e) var e = window.event;
      if (e.keyCode) code = e.keyCode;
      else if (e.which) code = e.which;
      var character = String.fromCharCode(code); 
      if(code==8)
      {}   
      else
      {          
        if(code > 47 && code < 58)
          {
      //-------------
          var conteudo;
          conteudo = document.getElementById("ctl00_txtLogin").value;
          if(conteudo.length==3)
          {
           conteudo = conteudo + ".";
           document.getElementById("ctl00_txtLogin").value = conteudo;
          }
          else if(conteudo.length==7)
          {
           conteudo = conteudo + ".";
           document.getElementById("ctl00_txtLogin").value = conteudo; 
          }
          else if(conteudo.length==11)
          {
           conteudo = conteudo + "-";
           document.getElementById("ctl00_txtLogin").value = conteudo; 
          }
       }
     else{
        event.keyCode = 0;
     }         
    }
}