Bug 193875 we can not get an entir url by IHTMLActionHandler
we can not get an entir url by IHTMLActionHandler, so word emitter dose not write the right url. now hyperlink drill through in word emitter doesn't work.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
{
			title = BirtResources
					.getMessage( ResourceConstants.BIRT_VIEWER_TITLE );
		}
		return htmlEncode( title );
	}
	/**
	 * Get report format.
	 * 
	 * @param request
	 *            http request
	 * @return report format
	 */
	public static String getFormat( HttpServletRequest request )
	{
		String format = getParameter( request, PARAM_FORMAT );
		if ( format != null && format.length( ) > 0 )
		{
			if ( PARAM_FORMAT_HTM.equalsIgnoreCase( format ) )
				return PARAM_FORMAT_HTML;
			return format;
		}
		return PARAM_FORMAT_HTML; 
	}
	/**
	 * Get preview max rows.
	 * 
	 * @param request
	 *            http request
	 * @return max rows