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
protected static boolean isInitContext = false;
	/**
	 * Overwrite flag
	 */
	public static boolean isOverWrite;
	/**
	 * Application Context Attribute Name
	 */
	public static final String ATTR_APPCONTEXT_KEY = "AppContextKey"; 
	/**
	 * Application Context Attribute value
	 */
	public static final String ATTR_APPCONTEXT_VALUE = "AppContextValue"; 
	/**
	 * The initialized properties map
	 */
	public static Map initProps;
	/**
	 * viewer properties
	 */
	public static final String PROP_BASE_URL = "base_url"; 
	/**
	 * Engine supported output formats
	 */
	public static String[] supportedFormats = {PARAM_FORMAT_HTML,
			PARAM_FORMAT_PDF};
	/**
	 * Flag that indicated if support print on the server side.
	 */
	public static boolean isSupportedPrintOnServer = true;