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
*/
	public static void setClean( HttpServletRequest request )
	{
		String isClean = getParameter( request, PARAM_CLEAN_SESSION );
		if ( "false".equalsIgnoreCase( isClean ) ) 
			isCleanSessionFiles = false;
		else if ( "true".equalsIgnoreCase( isClean ) ) 
			isCleanSessionFiles = true;
	}
	/**
	 * Check If force optimized HTML output.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isAgentStyle( HttpServletRequest request )
	{
		boolean flag = isAgentStyle;
		String urlParam = getParameter( request, PARAM_AGENTSTYLE_ENGINE );
		if ( "true".equalsIgnoreCase( urlParam ) ) 
		{
			flag = true;
		}
		else if ( "false".equalsIgnoreCase( urlParam ) ) 
		{
			flag = false;
		}
		return flag;
	}
}