Bug 145749 Strange "Stack Trace" appears when navigating the controls in Enter parameter dialog by tab key
Description: Strange "Stack Trace" appears when navigating the controls in Enter parameters dialog by tab key. Steps to reproduce: 1. New a report 2. New a parameter without default value 3. Switch to Preview tab, Enter parameters dialog will pop up 4. Use tab key to navigate the controls in this dialog Expected result: Can navigate the controls correctly Actual result: A strange "Stack Trace" appears when cancle button lose focus. Please see screen shot.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/presentation/aggregation/layout/RequesterFragment.java
{
	/**
	 * Override implementation of doPostService.
	 */
	protected String doPostService( HttpServletRequest request, HttpServletResponse response )
		throws ServletException, IOException
	{
		String className = getClass( ).getName( )
				.substring( getClass( ).getName( ).lastIndexOf( '.' ) + 1 );
		return JSPRootPath + "/pages/layout/" + className + ".jsp"; 
	}
	
	/**
	 * Override build method.
	 */
	protected void build( )
	{
		addChild( new DocumentFragment( ) );
		addChild( new DialogContainerFragment( new ExceptionDialogFragment( ) ) );
		addChild( new DialogContainerFragment( new ParameterDialogFragment( ) ) );
	}
}