out of curiosity: what would you use for the URL validation?<p>(but i get this is difficult: <a href="https:&#x2F;&#x2F;gist.github.com&#x2F;dperini&#x2F;729294" rel="nofollow">https:&#x2F;&#x2F;gist.github.com&#x2F;dperini&#x2F;729294</a> )