function textoEmBranco( id ){
	obj = document.getElementById( id );
	if( obj.value == "" ) return false;
	return true;
}

function textoMenorQue( id, tam ){
	obj = document.getElementById( id );
	if( obj.value.length < tam ) return false;
	return true;
}

function emailValido( id ){
	obj = document.getElementById( id );
	var er = /^([a-z]|[0-9]|[_.]){3,}\@([a-z]|[0-9]|[_]){2,}\.{1}[a-z]{2,}(\.{1}[a-z]{2,})*$/;
	if( !er.test( obj.value ) ) return false;
	return true;
}

function compararCampos( id ){
	obj = document.getElementById( id );
	obj2 = document.getElementById( "repete_" + id );
	if( obj.value != obj2.value ) return false;
	return true;
}

function cpfOuCnpjValido( id ){
	obj = document.getElementById( id );
	txt = obj.value;
	if( txt.length == 11 ) return isCpf( txt );
	else return isCnpj( txt );	
}