A box just comes out of nowhere which says "chat with an expert". It happened once on Stack Overflow and once on Meta. Is this an ad? Isn't Meta supposed to have no ads?
Here's the HTML for that weird box:
<div id="adviza-box" style="width: 380px; ">
<div id="adviza-status">
<img width="34" height="34" src="https://i.sstatic.net/owly4.png">
<span class="hoverable">chat with an expert</span>
</div>
<div id="no-adviza">
<span class="hoverable" style="display: inline; ">not now</span><br>
<span class="hoverable" style="display: inline; ">never</span>
</div>
</div>
Looks like this line does it:
StackExchange.ready(function () { StackExchange.adviza.init(170118, 20, 100, 0); });
For those of you who are interested, here are
(courtesy of @Manishearth)
Here's what it looks like after you click it:
The iframe of the chat box:
<iframe width="380" height="280" src="http://adviza.stackexchange.com/chat/iframe?key=6tJMyqSoOUid&token=Yok0qhJckSA0" id="adviza-iframe" frameborder="0" style="left: 0px; position: relative; "></iframe>
iframe
chasing me across the page.