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 boolean isRelativePath( String fileName )
	{
		if ( fileName == null )
		{
			return false;
		}
		return !new File( fileName ).isAbsolute( );
	}
	/**
	 * Check whether report parameter exists in the url.
	 * 
	 * @param request
	 *            http request
	 * @param name
	 *            parameter name
	 * @return whether report parameter exists in the url
	 */
	public static boolean isReportParameterExist( HttpServletRequest request,
			String name )
	{
		assert request != null && name != null;
		boolean isExist = false;
		Map paramMap = request.getParameterMap( );
		String ISOName = toISOString( name );
		if ( paramMap != null && paramMap.containsKey( ISOName ) )
		{
			isExist = true;
		}
		Set nullParams = getParameterValues( request, PARAM_ISNULL );