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
/**
	 * URL parameter name that specifies the report title.
	 */
	public static final String PARAM_TITLE = "__title"; 
	/**
	 * URL parameter name that specifies whether show the report title.
	 */
	public static final String PARAM_SHOW_TITLE = "__showtitle"; 
	/**
	 * URL parameter name that specifies whether show the toolbar.
	 */
	public static final String PARAM_TOOLBAR = "__toolbar"; 
	/**
	 * URL parameter name that specifies whether show the navigationbar.
	 */
	public static final String PARAM_NAVIGATIONBAR = "__navigationbar"; 
	/**
	 * URL parameter name that specifies whether force prompting the parameter
	 * dialog.
	 */
	public static final String PARAM_PARAMETER_PAGE = "__parameterpage"; 
	/**
	 * URL parameter name that gives the report design name.
	 */
	public static final String PARAM_REPORT = "__report"; 
	/**
	 * URL parameter name that gives the report document name.
	 */
	public static final String PARAM_REPORT_DOCUMENT = "__document"; 
	/**