how to make a current website responsive? <p>I want to make my current website responsive. It's a huge dynamic website and I do not want to make a separate website for mobile or change the <code>&lt;Doctype&gt;</code> or <code>&lt;html&gt;</code>. Is it possible to insert a script that changes the <code>&lt;Doctype&gt;</code> and <code>&lt;html&gt;</code> tags if a website is accessed via a mobile?</p>