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
}
		else
		{
			lerh = null;
		}
		if ( StructureType.AXIS_LABEL.equals( src.getType( ) ) )
		{
			axisLabel = (String) src.getSource( );
		}
		else
		{
			axisLabel = null;
		}
		ScriptUtil.script( callbackFunction, dph, lerh, axisLabel );
		if ( hasEndTag )
		{
			callbackFunction.append( ");" ); 
		}
	}
	private String generateCallBackMethodName( String funcName )
	{
		return "function " 
				+ funcName
				+ "(evt,source,"
				+ ScriptHandler.BASE_VALUE
				+ ","
				+ ScriptHandler.ORTHOGONAL_VALUE
				+ ","
				+ ScriptHandler.SERIES_VALUE
				+ ","