How to prevent elements from have the same offset value?

[ayoubnet]

I am trying to create a page with a similar layout to facebook. I have created the two column grid using the Masonry plugin. Now I am trying to create the little tooltips that facebook has for each post which creates the timeline effect. The problem is that some articles are aligned equally, their tooltips will overlap. Is there a way to check of any two articles have the same top offset (??) and if so add some margin to one of them so that they are not the same. I tried to illustrate the grid here http://d.pr/i/9MzP - the idea is the green boxes is what I have a problem with, I dont want them to be parallel with each other. Thanks