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
/**
	 * Flag that indicated if clean session files.
	 */
	public static boolean isCleanSessionFiles = true;
	/**
	 * Optimized HTML output flag
	 */
	public static boolean isAgentStyle;
	/**
	 * Get bookmark. If page exists, ignore bookmark.
	 * 
	 * @param request
	 * @return the bookemark
	 */
	public static String getBookmark( HttpServletRequest request )
	{
		int page = getParameterAsInt( request, PARAM_PAGE );
		return page < 1
				? getReportParameter( request, PARAM_BOOKMARK, null )
				: null;
	}
	/**
	 * Get query string with new parameter value.
	 * 
	 * @param request
	 *            http request
	 * @param name
	 *            parameter name
	 * @param value
	 *            default parameter value