//usar assim  
// onkeypress="return mask(true, event, this, '####-#');"
 
// Formata o campo valor
function formataValor(campo) {
	campo.value = filtraCampo(campo);
	vr = campo.value;
	tam = vr.length;

	if ( tam <= 2 ){ 
 		campo.value = vr ; }
 	if ( (tam > 2) && (tam <= 5) ){
 		campo.value = vr.substr( 0, tam - 2 ) + ',' + vr.substr( tam - 2, tam ) ; }
 	if ( (tam >= 6) && (tam <= 8) ){
 		campo.value = vr.substr( 0, tam - 5 ) + vr.substr( tam - 5, 3 ) + ',' + vr.substr( tam - 2, 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 - 2, 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 - 2, tam ) ; }
 	if ( (tam >= 15) && (tam <= 18) ){
 		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 ) ;}
}
// limpa todos os caracteres especiais do campo solicitado
function filtraCampo(campo){
	var s = "";
	var cp = "";
	vr = campo.value;
	tam = vr.length;
	for (i = 0; i < tam ; i++) {  
		if (vr.substring(i,i + 1) != "/" && vr.substring(i,i + 1) != "-" && vr.substring(i,i + 1) != "."  && vr.substring(i,i + 1) != "," ){
		 	s = s + vr.substring(i,i + 1);}
	}
	campo.value = s;
	return cp = campo.value
}

function mask(isNum, event, field, mask, maxLength) {

	var keyCode;
	if (event.srcElement)
		keyCode = event.keyCode;
	else if (event.target)
		keyCode = event.which;
		
	var maskStack = new Array();
		
	var isDynMask = false;
	if (mask.indexOf('[') != -1)
		isDynMask = true;
				
	var length = mask.length;
	
	for (var i = 0; i < length; i++)
		maskStack.push(mask.charAt(i));
		
	var value = field.value;
	var i = value.length;
	
	if (keyCode == 0 || keyCode == 8)
		return true;

	//código adaptado para aceitar X (maiúsculo) ou x (minúsculo), além de números
	if (isNum && (keyCode < 48 || keyCode > 57) && (keyCode != 88) && (keyCode != 120))
		return false;
	
	if (!isDynMask && i < length) {
		
		if (maskStack.toString().indexOf(String.fromCharCode(keyCode)) != -1 && keyCode != 8) {
			return false;
		} else {
			if (keyCode != 8) {
				if (maskStack[i] != '#') {
					var old = field.value;
					field.value = old + maskStack[i];
				}			
			}
			
			/*if (autoTab(field, keyCode, length)) {
				if (!document.layers) {
					return true;
				} else if (keyCode != 8) {
					field.value += String.fromCharCode(keyCode);
					return false;
				} else {
					return true;
				}
			} else {
				return false;
			}*/				
		}
		
	} else if (isDynMask) { 
							
		var maskChars = "";
		for (var j = 0; j < maskStack.length; j++)
			if (maskStack[j] != '#' && maskStack[j] != '[' && maskStack[j] != ']')
				maskChars += maskStack[j];

		var tempValue = "";
		for (var j = 0; j < value.length; j++) {
			if (maskChars.indexOf(value.charAt(j)) == -1)
				tempValue += value.charAt(j);
		}
		
		value = tempValue + String.fromCharCode(keyCode);
						
		if (maskChars.indexOf(String.fromCharCode(keyCode)) != -1) {
			return false;
		} else {
		
			var staticMask = mask.substring(mask.indexOf(']') + 1);
			var dynMask = mask.substring(mask.indexOf('[') + 1, mask.indexOf(']'));
		
			var realMask = new Array;
		
			if (mask.indexOf('[') == 0) {
				var countStaticMask = staticMask.length - 1;
				var countDynMask = dynMask.length - 1;
				for (var j = value.length - 1; j >= 0; j--) {
					if (countStaticMask >= 0) {
						realMask.push(staticMask.charAt(countStaticMask));
						countStaticMask--; 
					} 
					if (countStaticMask < 0) {
						if (countDynMask >= 0) {
							if (dynMask.charAt(countDynMask) != '#') {
								realMask.push(dynMask.charAt(countDynMask));
								countDynMask--;
							}
						}
						if (countDynMask == -1) {
							countDynMask = dynMask.length - 1;
						}
						realMask.push(dynMask.charAt(countDynMask));
						countDynMask--; 
					}
				}
			}
			
			var result = "";
				
			var countValue = 0;
			while (realMask.length > 0) {
				var c = realMask.pop();	
				if (c == '#') {
					result += value.charAt(countValue);
					countValue++;	
				} else {
					result += c;
				}
			}
			
			field.value = result;
		
			/*if (maxLength != undefined &&  value.length == maxLength) {
				
				var form = field.form;
				for (var i = 0; i < form.elements.length; i++) {
					if (form.elements[i] == field) {
						field.blur();
						//if alterado para quando a máscara for utilizada no último campo, não dê mensagem de erro quando tentar colocar o foco no "Salvar"
						//if (form.elements[i + 1] != null)										 
						if ((form.elements[i + 1] != null) && (form.elements[i + 1].name != "METHOD"))
							form.elements[i + 1].focus();
						break;
					}
				}
			}*/
			
			return false;
		}
	} else {
		return false;
	}
	/*function autoTab(field, keyCode, length) {
		var i = field.value.length;
			
		if (i == length - 1) {
		
			field.value += String.fromCharCode(keyCode);
		
			var form = field.form;
			for (var i = 0; i < form.elements.length; i++) {
				if (form.elements[i] == field) {
					field.blur();										 
					//if alterado para quando a máscara for utilizada no último campo, não dê mensagem de erro quando tentar colocar o foco no "Salvar"
					//if (form.elements[i + 1] != null)
					if ((form.elements[i + 1] != null) && (form.elements[i + 1].name != "METHOD"))
						form.elements[i + 1].focus();
					break;
				}
			}
			
			return false;
		} else {
			return true;
		}	
	}*/
}

//adiciona mascara de cnpj
function MascaraCNPJ(cnpj){
    if(mascaraInteiro(cnpj)==false){
        event.returnValue = false;
    }    
    return formataCampo(cnpj, '00.000.000/0000-00', event);
}

//adiciona mascara de cep
function MascaraCep(cep){
        if(mascaraInteiro(cep)==false){
        event.returnValue = false;
    }    
    return formataCampo(cep, '00.000-000', event);
}

//adiciona mascara de data
function MascaraData(data){
    if(mascaraInteiro(data)==false){
        event.returnValue = false;
    }    
    return formataCampo(data, '00/00/0000', event);
}

//adiciona mascara ao telefone
function MascaraTelefone(tel){    
    if(mascaraInteiro(tel)==false){
        event.returnValue = false;
    }    
    return formataCampo(tel, '(00) 0000-0000', event);
}

//adiciona mascara ao CPF
function MascaraCPF(cpf){
    if(mascaraInteiro(cpf)==false){
        event.returnValue = false;
    }    
    return formataCampo(cpf, '000.000.000-00', event);
}

//valida telefone
function ValidaTelefone(tel){
    exp = /\(\d{2}\)\ \d{4}\-\d{4}/
    if(!exp.test(tel.value))
        alert('Numero de Telefone Invalido!');
}

//valida CEP
function ValidaCep(cep){
    exp = /\d{2}\.\d{3}\-\d{3}/
    if(!exp.test(cep.value))
        alert('Numero de Cep Invalido!');        
}

//valida data
function ValidaData(data){
    exp = /\d{2}\/\d{2}\/\d{4}/
    if(!exp.test(data.value))
        alert('Data Invalida!');            
}

//valida o CPF digitado
function ValidarCPF(Objcpf){
    var cpf = Objcpf.value;
    exp = /\.|\-/g
    cpf = cpf.toString().replace( exp, "" ); 
    var digitoDigitado = eval(cpf.charAt(9)+cpf.charAt(10));
    var soma1=0, soma2=0;
    var vlr =11;
    
    for(i=0;i<9;i++){
        soma1+=eval(cpf.charAt(i)*(vlr-1));
        soma2+=eval(cpf.charAt(i)*vlr);
        vlr--;
    }    
    soma1 = (((soma1*10)%11)==10 ? 0:((soma1*10)%11));
    soma2=(((soma2+(2*soma1))*10)%11);
    
    var digitoGerado=(soma1*10)+soma2;
    if(digitoGerado!=digitoDigitado)    
        alert('CPF Invalido!');        
}

//valida numero inteiro com mascara
function mascaraInteiro(){
    if (event.keyCode < 48 || event.keyCode > 57){
        event.returnValue = false;
        return false;
    }
    return true;
}

//valida o CNPJ digitado
function ValidarCNPJ(ObjCnpj){
    var cnpj = ObjCnpj.value;
    var valida = new Array(6,5,4,3,2,9,8,7,6,5,4,3,2);
    var dig1= new Number;
    var dig2= new Number;
    
    exp = /\.|\-|\//g
    cnpj = cnpj.toString().replace( exp, "" ); 
    var digito = new Number(eval(cnpj.charAt(12)+cnpj.charAt(13)));
        
    for(i = 0; i<valida.length; i++){
        dig1 += (i>0? (cnpj.charAt(i-1)*valida[i]):0);    
        dig2 += cnpj.charAt(i)*valida[i];    
    }
    dig1 = (((dig1%11)<2)? 0:(11-(dig1%11)));
    dig2 = (((dig2%11)<2)? 0:(11-(dig2%11)));
    
    if(((dig1*10)+dig2) != digito && cnpj !=''){ 
        alert('CNPJ Invalido!');
		ObjCnpj.value = '';
	}
        
}

//formata de forma generica os campos
function formataCampo(campo, Mascara, evento) { 
    var boleanoMascara; 
    
    var Digitato = evento.keyCode;
    exp = /\-|\.|\/|\(|\)| /g
    campoSoNumeros = campo.value.toString().replace( exp, "" ); 
   
    var posicaoCampo = 0;     
    var NovoValorCampo="";
    var TamanhoMascara = campoSoNumeros.length;; 
    
    if (Digitato != 8) { // backspace 
        for(i=0; i<= TamanhoMascara; i++) { 
            boleanoMascara  = ((Mascara.charAt(i) == "-") || (Mascara.charAt(i) == ".")
                                || (Mascara.charAt(i) == "/")) 
            boleanoMascara  = boleanoMascara || ((Mascara.charAt(i) == "(") 
                                || (Mascara.charAt(i) == ")") || (Mascara.charAt(i) == " ")) 
            if (boleanoMascara) { 
                NovoValorCampo += Mascara.charAt(i); 
                  TamanhoMascara++;
            }else { 
                NovoValorCampo += campoSoNumeros.charAt(posicaoCampo); 
                posicaoCampo++; 
              }            
          }     
        campo.value = NovoValorCampo;
          return true; 
    }else { 
        return true; 
    }
}