Several ways to make a return link

<a href="home">Back</a> - this one may give a 404 sometimes, not always

<a href="javascript:history.back()">Back to previous page</a>

<a href="javascript: history.go(-1)">Go Back</a>

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

<input type="button" value="back" onclick="history.back()"/> 



This next one is not a true back to referring page, but up directory level

When you want the back button to go exactly one level back in the URL tree, you can use the following code:

<a href="../"><input type="button" value="Back"/></a>
Append multiple ../ to go multiple steps back in the URL tree.