gistfile1.js

// validation
$('.zip .editable').editable('click', function(e){
  if(e.value.match(/^\d{3}\-\d{4}$/)){
    alert(e.target.selector + ' : ' + e.value);
  }
  else{
    $('.zip .editable').html(e.old_value);
    alert(e.value + ' is not valid zip-code');
  }
});