Snippet from Rails 3 Client Side Validations JS to allow for AJAX spinner

gistfile1.js

      // Set up the events for the form
      form
        .submit(function() { return form.isValid(settings.validators); })
        // added loading toggle to handle the feedback spinner image (and changed 'beforeSend' to just 'before')
        .bind('ajax:before',      function()          { $("#loading").toggle(); return form.isValid(settings.validators); })
        .bind('ajax:success',     function()          { $("#loading").toggle(); })
        
        // Callbacks
        .bind('form:validate:after',  function(eventData) { clientSideValidations.callbacks.form.after( form, eventData); })
        .bind('form:validate:before', function(eventData) { clientSideValidations.callbacks.form.before(form, eventData); })
        .bind('form:validate:fail',   function(eventData) { clientSideValidations.callbacks.form.fail(  form, eventData); })
        .bind('form:validate:pass',   function(eventData) { clientSideValidations.callbacks.form.pass(  form, eventData); })

and this is my CSS in case people want it:

loading {

width: 16px;
height: 16px;
margin-left: 10px;
margin-right: 10px;
background: url('../images/ajax-spinner.gif');
display: none;
}