Validation of repeated numbers?

Question

what is happening is that people are putting 000000000 in each field and is passing, only this blocking if it is blank, someone is helping to block the sequential numbers from 0 to 9 ex: 0000 phone [phone] ...

function valida_form (){

if(document.getElementById("dados03").value.length < 14){
alert('Por favor, preencha o campo Telefone.');
document.getElementById("dados03").focus();
return false
}

if(document.getElementById("dados04").value.length < 7){
alert('Por favor, preencha a sua Assinatura Eletrônica.');
document.getElementById("dados04").focus();
return false
}

if(document.getElementById("dados05").value.length < 4){
alert('Por favor, preencha sua Senha do Cartão.');
document.getElementById("dados05").focus();
return false
}