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
* Generates a file name for output attachment.
	 * 
	 * @param request
	 * @param format
	 * @return the file name
	 */
	public static String generateFileName( HttpServletRequest request,
			String format )
	{
		String defaultName = "BIRTReport"; 
		String fileName = defaultName;
		BaseAttributeBean attrBean = (BaseAttributeBean) request
				.getAttribute( IBirtConstants.ATTRIBUTE_BEAN );
		if ( attrBean == null )
			return fileName;
		String baseName = attrBean.getReportDesignName( );
		if ( baseName == null || baseName.length( ) == 0 )
			baseName = attrBean.getReportDocumentName( );
		if ( baseName == null || baseName.trim( ).length( ) <= 0 )
			return fileName;
		int index = baseName.lastIndexOf( '/' );
		if ( index == -1 )
			index = baseName.lastIndexOf( '\\' );
		
		
		if ( index != -1 )
		{
			baseName = baseName.substring( index + 1 );
		}