User:BelgianCat/common.js

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// Define a function called addLastPageButton
function addLastPageButton() { 
// 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="LastPageTest" 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();