Bug 214254 Expose Javascript "event" object for interactivity
When doing interactivity with a chart, and specifying a Mouse Click event with an Invoke Script action, the browser event object should be passed into the script. This object should be named "evt", and accompany the other standard category and value series parameters.
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGInteractiveRenderer.java
* @param src
	 *            StructureSource that is stored in the primitive render event.
	 * @return true if the object or its parent is a series component.
	 */
	private Object getElementFromSource( StructureSource src, StructureType type )
	{
		if ( src instanceof WrappedStructureSource )
		{
			WrappedStructureSource wss = (WrappedStructureSource) src;
			while ( wss != null )
			{
				if ( wss.getType( ) == type )
				{
					return wss.getSource( );
				}
				if ( wss.getParent( ).getType( ) == type )
				{
					return wss.getParent( ).getSource( );
				}
				if ( wss.getParent( ) instanceof WrappedStructureSource )
					wss = (WrappedStructureSource) wss.getParent( );
				else
					wss = null;
			}
		}
		else if ( src.getType( ) == type )
			return src.getSource( );
		return null;
	}
	/**