JQuery :: Synchronizing Vertical Scroll Of 2 Divs Based On When Waypoints Inside The Content Are Reached?

To synchronize the vertical scroll of the following "left" and "right" divs only when the beginning and end of each "blahN " div is reached inside the left div. Both divs have a finite height, which basically insures that the scroll bar will be present. The left div outputs text-based content from various database procedures while the right div outputs images corresponding to the text. The text is nothing more than pages from the website and as you can see inside the left div, each is encapsulated within a subsequent div with an incremental class (i.e.- "blah1", "blah2", and so forth.) When one scrolls through each "blah" content inside of the left div, I would like the right div to output the image that corresponds to the text (again, this data comes from the website through previous transactions.) Here's an example: John Doe comes to the website and starts reading the various pages listed inside the left div.

There might be 2 pages loaded inside the left div, or, there might be 20, but in any event, when he loads the entire page containing all this, the first page will be displayed along with the first pages' image. When he scrolls past this first entry (page) inside the left div, the corresponding image related to it inside the MySQL database is then output as well over in the right div and so on with every other "blahN " piece of content. Right now, the jQuery I'm using has synchronized both divs to scroll at the same time, regardless of specific waypoints that might be reached per-scrolling.

Here's the basic markup I'm using right now:

<div class="left">
<?php
foreach($obj->field_page_objs as $k1=>$v1){

[code]....

few other websites and the responsiveness has been minimal-to-nonexistent. I'm sure this is because of both how I've explained the problem combined with the overall difficulty (or niche-ness) it introduces. In any event, I apologize beforehand if this carries over into this website.