public function autoload($className)
	{
	    $className = ltrim($className, '\\');
	    $fileName  = '';
	    $namespace = '';
	    if ($lastNsPos = strrpos($className, '\\')) {
	        $namespace = substr($className, 0, $lastNsPos);
	        $className = substr($className, $lastNsPos + 1);
	        $fileName  = str_replace('\\', DIRECTORY_SEPARATOR, dirname(__FILE__). DIRECTORY_SEPARATOR . $namespace) . DIRECTORY_SEPARATOR;
	    }
	    $fileName .= str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
	    if(file_exists($fileName))
    		require $fileName;    		
	}