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/ReportEngineService.java
* 
	 * @param svgFlag
	 * @param servletPath
	 * @param request
	 * @return HTML render context from the given arguments
	 */
	private HTMLRenderContext createHTMLrenderContext( boolean svgFlag,
			String servletPath, HttpServletRequest request )
	{
		String baseURL = null;
		boolean isDesigner = ParameterAccessor.isDesigner( request );
		
		if ( !isDesigner )
			baseURL = ParameterAccessor.getBaseURL( );
		if ( baseURL == null )
			baseURL = ""; 
		
		baseURL += this.contextPath;
		HTMLRenderContext renderContext = new HTMLRenderContext( );
		renderContext.setImageDirectory( ParameterAccessor
				.getImageTempFolder( request ) );
		renderContext.setBaseImageURL( baseURL + imageBaseUrl );
		if ( servletPath != null && servletPath.length( ) > 0 )
		{
			renderContext.setBaseURL( baseURL + servletPath );
		}
		else
		{
			renderContext
					.setBaseURL( baseURL + IBirtConstants.SERVLET_PATH_RUN );