Bug 172643 Image in target report cannot display after drill through link.[04]
Description: Image in target report cannot display after drill through link. Build number:2.1.2.v20070202 Steps to reproduce: 1. New a folder inside project "scripting" 2. Copy attached report and image to scripting folder. 3. Preview the report and click the second image. Expected result: Open itself in a new window and display two images. Actual result: The first image cannot display. Error log:N/A
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ViewerHTMLActionHandler.java
if ( realBookmark )
		{
			link.append( "#" ); 
			link.append( bookmark );
		}
		else
		{
			link.append( ParameterAccessor.getQueryParameterString(
					ParameterAccessor.PARAM_BOOKMARK, bookmark ) );
		}
		return link.toString( );
	}
	/**
	 * builds URL for drillthrough action
	 * 
	 * @param action
	 *            instance of the IAction instance
	 * @param context
	 *            the context for building the action string
	 * @return a URL
	 */
	protected String buildDrillAction( IAction action, IReportContext context )
	{
		if ( action == null || context == null )
			return null;
		String baseURL = null;
		Object renderContext = getRenderContext( context );
		if ( renderContext instanceof HTMLRenderContext )
		{
			baseURL = ( (HTMLRenderContext) renderContext ).getBaseURL( );