How to differentiate between two chart present on same page?

[saaagarsingh]

If there are two or more charts present on the same page and I'm trying to access g.chart element using select it applies any effect on the very first g.chart element. I want to apply the effect differently on all the g.chart elements.
Is there a way or function through which we can pass some value which later on we can use to differentiate between the charts in our case?