Bug 132914 "Invalid page number" error message is hard coded.
"Invalid page number" error message is hard coded in DocumentProcessor.java. This must be externalized into *.properties file. If there are other hard coded error messages, please also externalize.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/AbstractBaseActionHandler.java
* @param context
	 * @param operation
	 * @param response
	 */
	public AbstractBaseActionHandler( IContext context, Operation operation,
			GetUpdatedObjectsResponse response )
	{
		this.context = context;
		this.operation = operation;
		this.response = response;
	}
	/**
	 * Execute action handler.
	 * 
	 * @exception RemoteException
	 * @return
	 */
	public void execute( ) throws RemoteException
	{
		__execute( );
	}
	/**
	 * Check whether the page number is valid or not.
	 * 
	 * @param pageNumber
	 * @param document
	 * @return
	 * @throws RemoteException
	 * @throws ReportServiceException
	 */