Introduction A few years ago, HTML 5 still wasn’t very well supported by most popular browsers so web sites were created mostly with Xhtml or HTML4. I still have a folder on my machine filled with HTML templates for both XTML and HTML 4. Inside of it there are also templates for newsletters, micro-sites, responsive templates and whatnot. All of them were built by taking code from 2 or 3 different templates and look like Frankenstein’s code monster....sites were created mostly with XHTML or HTML4. I still have a folder...several doctypes in HTML4 and XHTML which developers had to take...