Bug 312531 Highlight works differently when run SvgInteractivityViewer.java [13]
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGInteractiveRenderer.java
String value = style + CSSHelper.getCSSCursorValue( cursor );
		if ( value == null )
		{
			elm.setAttribute( "style", style + defaultValue );
		}
		else
		{
			elm.setAttribute( "style", style + value );
		}
	}
	
	private void addCallBackScript( StructureSource src,
			StringBuffer callbackFunction, boolean hasEndTag )
	{
		callbackFunction.append( "(evt," ); 
		callbackFunction.append( src.getSource( ).hashCode( ) );
		final DataPointHints dph;
		final LegendItemHints lerh;
		final String axisLabel;
		if ( StructureType.SERIES_DATA_POINT.equals( src.getType( ) ) )
		{
			dph = (DataPointHints) src.getSource( );
		}
		else
		{
			dph = null;
		}
		if ( StructureType.LEGEND_ENTRY.equals( src.getType( ) ) )
		{
			lerh = (LegendItemHints) src.getSource( );