MediaWiki:LastPage.js

Note: After saving, you may have to bypass your browser's cache to see the changes.

• Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
• Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
• Internet Explorer: Hold Ctrl while clicking Refresh, or press Ctrl-F5
• Opera: Go to Menu → Settings (Opera → Preferences on a Mac) and then to Privacy & security → Clear browsing data → Cached images and files.

// Define a function called addLastPageButton
function addLastPageButton() { 
  // Check if the current page is loaded inside an iframe
  if (window.location !== window.parent.location) { 
    // If so, create a new variable called 'output'
    var output;
    // Create a new div element to contain the button
    var container = document.createElement("div");
    // Set the innerHTML of the container to the button code
    container.innerHTML = '<button class="LastPage" onclick="var oldURL = document.referrer; window.location.href = oldURL;"><b>Return to Last Page</b></button>';
    // Append the container to the body of the page
    document.body.appendChild(container);
  }
}

// Call the addLastPageButton function when the page loads
addLastPageButton();