gistfile1.js

    $('#cep').blur(function(){
        var zip = $(this).val();
        zip = zip.replace('-','').replace('.','');
        $.ajax({
            url:'http://cep.urldaapi.com.br/'+zip+'.json',
            type: "GET",
            cache: false,
            dataType: "text",
            crossDomain: true,
            success:function(data){
                data = JSON.parse(data);
                $('#endereco').val(data.address);
                $('#bairro').val(data.neighborhood);
                $('#cidade').val(data.city);
                $('select[name=uf]').find("option[value='" + data.state + "']").prop("selected", true);
                $('select[name=uf]').parent().find('span').html(data.state);
                $('.black').remove();
            }
        });
    });