jQuery - Easy ajax forms

ajaxForms.js

var ajaxForms = function(/* TODO translations */){
  var self = this;
  $('form.ajax').each(function(i, form){
    var f = $(form)
      , submit = f.find('input[type="submit"]');
      
    if($.fn.html5Uploader && f.hasClass('html5')){
      f.find('[type="file"]').html5Uploader();
    }
      
    submit.click(function(){
      var data = {}, errors = [];
      f.find('[name]').each(function(i, input){
        var field = $(input)
          , v = self._validate(field);
        for(var i in v) {
          if(typeof v[i] == 'object')
            errors.push(v[i]);
        }
        if(errors.length > 0)
          return false;
        var name = field.attr('name')
          , val = field.val();
          
        data[name] = val;
      });
      
      if(errors.length > 0) {
        self._displayErrors(errors);
        return false;
      }
      
      if(!data.csrf)
        data.csrf = csrf;

      $[f.attr('method')](f.attr('action'), data, function(res){
          if(!res.error){
            for(var i in data){
              f.find('*[name="'+i+'"]').val('');
            }
            f.trigger('res', res);
          }
        }
      );
      return false;
    }) 

  });
}

ajaxForms.prototype._validate = function(field){
  var classes = field.attr('class');
  if(!classes)
    return true;
  
  classes = classes.split(/\s/g);
  var result = [];
  for(var i in classes){
    if(this[classes[i]] instanceof Function)
      result.push(this[classes[i]](field));
  }
  
  return result;
}

ajaxForms.prototype._displayErrors = function(errors){
  for(var i in errors){
    $.sticky(errors[i].error);
  }
}

ajaxForms.prototype._getLabelOf = function(field){
  var id = field.attr('id');
  if(!id)
    return '';
  var label = field.closest('form.ajax').find('label[for="' + id + '"]');
  if(!label)
    return '';
  
  return label.text();
}

ajaxForms.prototype.required = function(field){
  if(!field.val()) {
    var label = this._getLabelOf(field);
    return { error: 'Поле "' + label + '" не заполнено' };
  }
  
  return true;
}