testbed/matplotlib__matplotlib/doc/_templates/sidebar_versions.html

<div class="sidebar-versions">
<script>
function getSnippet(id, url) {
    var req = false;
    // For Safari, Firefox, and other non-MS browsers
    if (window.XMLHttpRequest) {
        try {
            req = new XMLHttpRequest();
        } catch (e) {
            req = false;
        }
    } else if (window.ActiveXObject) {
        // For Internet Explorer on Windows
        try {
            req = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
            req = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {
            req = false;
            }
        }
    }
    var element = document.querySelector(".sidebar-versions");
    if (req) {
        // Synchronous request, wait till we have it all
        req.open('GET', url, false);
        req.send(null);
        if (req.status == 200) {
            element.innerHTML = req.responseText;
        } else {
            element.innerHTML = "<mark>Could not find Snippet to insert at " + url + "</mark>"
        }
    }
}
getSnippet('other_versions', '/versions.html');
</script>
</div>