javascript - How to make an HTML back link?

Question

What is the simplest way to create an <a> tag that links to the previous web page? Basically a simulated back button, but an actual hyperlink. Client-side technologies only, please.

Edit
Looking for solutions that have the benefit of showing the URL of the page you're about to click on when hovering, like a normal, static hyperlink. I'd rather not have the user looking at history.go(-1) when hovering on a hyperlink. Best I've found so far is:

<script>
  document.write('<a href="' + document.referrer + '">Go Back</a>');
</script>

Answer 1

And another way:

<a href="javascript:history.back()">Go Back</a>