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
* (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.HTMLActionHandler#getURL(org.eclipse.birt.report.engine.api.IAction,
	 *      java.lang.Object)
	 */
	public String getURL( IAction actionDefn, Object context )
	{
		if ( actionDefn == null )
			return null;
		if ( context instanceof IReportContext )
			return getURL( actionDefn, (IReportContext) context );
		throw new IllegalArgumentException( "The context is of wrong type." ); 
	}
	/**
	 * Build URL for bookmark.
	 * 
	 * @param action
	 * @param context
	 * @return the bookmark url
	 */
	protected String buildBookmarkAction( 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( );