// para compo tipo moeda
function Limpar(valor, validos) {
// retira caracteres invalidos da string
var result = "";
var aux;
for (var i=0; i < valor.length; i++) {
aux = validos.indexOf(valor.substring(i, i+1));
if (aux>=0) {
result += aux;
}
}
return result;
}

//Formata número tipo moeda usando o evento onKeyDown

function Formata(campo,tammax,teclapres,decimal) {
var tecla = teclapres.keyCode;
vr = Limpar(campo.value,"0123456789");
tam = vr.length;
dec=decimal

if (tam < tammax && tecla != 8){ tam = vr.length + 1; }

if (tecla == 8 )
{ tam = tam - 1; }

if ( tecla == 8 || tecla >= 48 && tecla <= 57 || tecla >= 96 && tecla <= 105 )
{

if ( tam <= dec )
{ campo.value = vr; }

if ( (tam > dec) && (tam <= 5) ){
campo.value = vr.substr( 0, tam - 2 ) + "," + vr.substr( tam - dec, tam ); }
if ( (tam >= 6) && (tam <= 8) ){
campo.value = vr.substr( 0, tam - 5 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - dec, tam ); 
}
if ( (tam >= 9) && (tam <= 11) ){
campo.value = vr.substr( 0, tam - 8 ) + "." + vr.substr( tam - 8, 3 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - dec, tam ); }
if ( (tam >= 12) && (tam <= 14) ){
campo.value = vr.substr( 0, tam - 11 ) + "." + vr.substr( tam - 11, 3 ) + "." + vr.substr( tam - 8, 3 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - dec, tam ); }
if ( (tam >= 15) && (tam <= 17) ){
campo.value = vr.substr( 0, tam - 14 ) + "." + vr.substr( tam - 14, 3 ) + "." + vr.substr( tam - 11, 3 ) + "." + vr.substr( tam - 8, 3 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - 2, tam );}
} 
//onKeyDown="Formata(this,20,event,2)"
}
//**

/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Steve | http://jsmadeeasy.com/ */

function getObject(obj) {
  var theObj;
  if(document.all) {
    if(typeof obj=="string") {
      return document.all(obj);
    } else {
      return obj.style;
    }
  }
  if(document.getElementById) {
    if(typeof obj=="string") {
      return document.getElementById(obj);
    } else {
      return obj.style;
    }
  }
  return null;
}

function toCount(entrance,exit,text,characters) {
  var entranceObj=getObject(entrance);
  var exitObj=getObject(exit);
  var length=characters - entranceObj.value.length;
  if(length <= 0) {
    length=0;
    text='<span class="disable"> '+text+' </span>';
    entranceObj.value=entranceObj.value.substr(0,characters);
  }
  exitObj.innerHTML = text.replace("{CHAR}",length);
}