if ( pageNumber == 0 ) {
if ( pageNumber <= 0 ) {
	public void setBookmark( String bookmark ) throws EngineException	{		long pageNumber = reportDoc.getPageNumber( bookmark );		if ( pageNumber == 0 ) {			throw new EngineException( "Can't find bookmark :{0}", bookmark ); //$NON-NLS-1$		}		innerRender = new PageRender( pageNumber );	}