function __autoload($className){

    $root = $_SERVER['DOCUMENT_ROOT']. '/';

    if(strpos($className,'_')){
        if(0 === strpos($className,'process')){
            $className = explode('_',$className);
            $className = 'processes/'.$className[1].'.php5';
        }else{
            $className = explode('_',$className);
            $str_path = '';
            foreach($className as $k=>$v){
                $str_path .= $className[$k].'/';
            }
            $str_path = trim($str_path, '/');
            //$className = 'classes/'.$className[0].'/'.$className[1].'.php5';
            $className = 'classes/'.$str_path.'.php5';
        }
    }elseif(false !== strpos($className,'Exception')){
        $className = 'classes/exceptions/'.$className.'.php5';
    }else
        $className = 'classes/'.$className.'.php5';
    if(!file_exists($root.$className))
        trigger_error('File '.$className.' not found ',E_USER_ERROR );
    include_once($root.$className);
 }