click event for specific timeline label?

Hello,

I am creating an interactive map: San Diego Gaslamp Interactive Walking Map

...it is still in progress at the moment, so only a few things work.

This question is in regards to the "LODGING/ACCOMMODATIONS" menu on the right hand side.

I am trying to create 2 click events. Click to open and click to close, so I'm wondering if it's possible to do something like this:

if at label 2 sym.stop("label1");

if at label 1 sym.stop("label2");

I'm not sure how to code the "if at label 2" part...or if it's even possible.

Any help would be greatly appreciated!