Bug 156912 Proxy problems with birt-viewer.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
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
	 */
	public static int getMaxRows( HttpServletRequest request )
	{
		int curMaxRows = ParameterAccessor.getParameterAsInt( request,
				PARAM_MAXROWS );
		if ( curMaxRows <= 0 )
			curMaxRows = maxRows;
		return curMaxRows;
	}
	/**
	 * Get report element's iid.
	 * 
	 * @param request
	 * @return report element's iid
	 */
	public static String getIId( HttpServletRequest request )
	{
		return getReportParameter( request, PARAM_IID, null );