I’ve been wondering if I should be using Try / Catch for more readable code. My biggest worry is of course efficient. Found this concise test on JSFiddle. http://jsfiddle.net/jonjenkins/adJQn/
Google just released a new tool for reviewing your site DOM security. Read more and download the Chrome extension after the jump. https://code.google.com/p/domsnitch/wiki/DOMSnitchDoc