How to preview a link with URLatex.
Download Javascript
Download the URLatex JavaScript to your local machine. Either copy and paste or right-click the link and click "Save as..."
Upload to Web Server
Upload the Javascript to your web root folder (hint: this is usually where your index.html file is) or a subdirectory.
Include on Web Site(s)
Include in the head tag of every page you want it active on:
<script type="text/javascript" src="urlatex.js"></script> <script type="text/javascript"> URLatex(); </script>
Be sure to change the src to match the actual location on your server.
Configure
You can disable URLatex from specific links by adding rel="nolatex" to any link tag.