Bug 173582 Run servlet should not be affected by values in document.[0000]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
isOverWrite = false;
		}
		
		initProps = initViewerProps( context, initProps );
		
		clearTempFiles( );
		
		isInitContext = true;
	}
	/**
	 * Check whether the viewer is used in designer or not.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isDesigner( HttpServletRequest request )
	{
		boolean isDesigner = false;
		if ( "true".equalsIgnoreCase( getParameter( request, PARAM_DESIGNER ) ) ) 
		{
			isDesigner = true;
		}
		return isDesigner;
	}
	/***************************************************************************
	 * For export data
	 **************************************************************************/
	/**
	 * Check whether the request is to get image.
	 *