Webpages can also be set up to do similar things simply upon being loaded in the first place (think that middle step after the login button is pressed being built into the page itself). When you click on 'submit' or 'go' or whatever they've labeled the button, the webpage will 'post' that information to another page which then does something based on that information, which could result in a redirection to yet another page. One feature of webpages is that you can use them to submit information to other webpages (think simple web forms like username and password boxes).
