protected function beforeSave()
{
    if(parent::beforeSave())
    {
        if($this->isNewRecord)
        {
            $this->salt = md5(rand(10,10000) . $this->email);
            $this->password = md5($this->salt."#".$this->password);
        }
        else
            $this->password = $model->password;
        return true;
    }
    else
        return false;
}