function showTocToggle() {
    if (document.createTextNode) {
        // Uses DOM calls to avoid document.write + XHTML issues

        var linkHolder = document.getElementById('toctitle');
        if (!linkHolder) {
            return;
        }

        var outerSpan = document.createElement('span');
        outerSpan.className = 'toctoggle';

        var toggleLink = document.createElement('a');
        toggleLink.id = 'togglelink';
        toggleLink.className = 'internal';
        toggleLink.href = 'javascript:toggleToc()';
        toggleLink.appendChild(document.createTextNode(tocHideText));

        outerSpan.appendChild(document.createTextNode('['));
        outerSpan.appendChild(toggleLink);
        outerSpan.appendChild(document.createTextNode(']'));

        linkHolder.appendChild(document.createTextNode(' '));
        linkHolder.appendChild(outerSpan);

        var cookiePos = document.cookie.indexOf("hidetoc=");
        if (cookiePos > -1 && document.cookie.charAt(cookiePos + 8) == 1) {
            toggleToc();
        }
    }
}

function toggleToc() {
    var toc = document.getElementById('toc').getElementsByTagName('ul')[0];
    var toggleLink = document.getElementById('togglelink');

    if (toc && toggleLink && toc.style.display == 'none') {
        changeText(toggleLink, tocHideText);
        toc.style.display = 'block';
        document.cookie = "hidetoc=0; path=/";
    } else {
        changeText(toggleLink, tocShowText);
        toc.style.display = 'none';
        document.cookie = "hidetoc=1; path=/";
    }
}

function changeText(el, newText) {
    // Safari work around
    if (el.innerText) {
        el.innerText = newText;
    } else if (el.firstChild && el.firstChild.nodeValue) {
        el.firstChild.nodeValue = newText;
    }
}