On websites like eBay, if you would time-out of your session, and say you were looking at a shoe, when you come back(after your sleep) to the page, you'd see the shoe, but you're logged out.
However, once you log back in, you get directed to that shoe immediately.
I am thinking that I say : "After timeout from website, upon re-login go back directly to page where timeout happened."
But how is this functionality described(as in, what technologies will we use)? Also, is it something that needs alot of resources?