When someone clicks "back", how do I get the user to the same position? (PHP)
<p>When someone clicks on a link, it sends them to it. But when a user clicks back, i want it to be at the position where they were before. 
What is the name for this and how do I go about doing this?</p>

<p>Like on SO, when I click "back", the scroll bar isn't at the top but rather at the position where I was last. </p>
