I need the URLs of all the exhibitors at a trade show.
Url: Show Map
The exhibitors must be clicked one by one on the left side. Then the info page of that exhibitor opens. When you click "visit website", their website opens in a new tab. I'm trying to figure out which selectors I must make but I need a black belt webscraper to help me out 
The weird thing is (and I'm a quite ok programmer) that the URL is nowhere to be found in the code when you go to the inspector. This is the link:
a href="javascript:void(0)" textcontent.bind="websitePhrase" click.delegate="onLinkClicked(websiteURL)" class="au-target" au-target-id="258">Visit Website</a
How on earth does the browser know the value of websiteURL in the call to onLinkClicked? I suspect there's a client side table in Javascript that fills it, but where?
I only need the URLs, so I don't need any other info from the detail page.