I have a StumbleUpon button at the bottom of each page but I can't figure out how to trigger and send a Social Interaction to Google Analytics (Universal). This button is wrapped inside an iframe. Below is the outer code for this block:
<iframe id="iframe-stmblpn-widget-1" src="http://badge.stumbleupon.com/badge/embed/1/?url=http%3A%2F%2Fcompositesmanufacturingmagazine.com%2F2014%2F08%2Fworlds-largest-carbon-composites-superyacht-launched%2F" style="overflow: hidden; margin: 0px; padding: 0px; border: 0px none;" allowtransparency="true" scrolling="no" frameborder="0" height="18" width="74"></iframe>
I was able to setup Social Interaction Tracking for Facebook, Twitter and Pinterest but this one is driving me nuts. Any help would be much appreciated.