Desabilitar outros campos ao digitar

by Jairo Fontes

HTML

<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<form id="formLogin">
    <input name="nome" id="nome"  />
    <input name="icpf" id="icpf" />
    <input name="icnpj" id="icnpj" />
</form>

CSS

input {
    border: 1px solid #CCCCCC;
    box-shadow: 2px 2px 4px #EEEEEE inset;
    color: #999999;
    font-size: 18px;
    font-weight: 300;
    margin: 0 0 10px;
    padding: 10px;
    position: relative;
    width: 97%;
    font-family:'Roboto'
}
input:focus {
    border-color: #CCC;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    -o-box-shadow: none;
    box-shadow: none;
    background-color: #F3F3F3;
}
select {
    border: 1px solid #CCCCCC;
    box-shadow: 2px 2px 4px #EEEEEE inset;
    color: #999999;
    font-size: 18px;
    font-weight: 300;
    margin: 0 0 10px;
    padding: 10px;
    position: relative;
    width: 99.7%;
    font-family:'Roboto';
    option {
        color: #999999;
        font-size: 18px;
        font-weight: 300;
        padding-left: 10px;
        position: relative;
        font-family:'Roboto';
    }
}

JavaScript

$("#formLogin input").on('input',function(){
  if ($(this).val() != ""){
    $(this).siblings().prop('disabled', true);
  }else{
    $(this).siblings().prop('disabled', false);
  }
})