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
* Locates a category design-time series corresponding to a given cloned
	 * run-time series.
	 * 
	 * @param seDT
	 *            runtime Series
	 * @return category Series
	 */
	private Series findCategorySeries( Series seDT )
	{
		final Chart cmDT = _iun.getDesignTimeModel( );
		if ( cmDT instanceof ChartWithAxes )
		{
			return (Series) ( (SeriesDefinition) ( (ChartWithAxes) cmDT ).getBaseAxes( )[0].getSeriesDefinitions( )
					.get( 0 ) ).getRunTimeSeries( ).get( 0 );
		}
		else
		{
			return (Series) ( (SeriesDefinition) ( (ChartWithoutAxes) cmDT ).getSeriesDefinitions( )
					.get( 0 ) ).getRunTimeSeries( ).get( 0 );
		}
	}
	/**
	 * Prepare event handling
	 */
	public void prepareInteractiveEvent( Element elm, InteractionEvent ie,
			Trigger[] triggers )
	{
		
		
		triggers = removeAddedOnloadEvent( ie, triggers );