function hideTableOfContents(id) {

        document.getElementById(id).style.display = 'block';

        eval("document.getElementById('" + id + "_view').style.display = 'none'");

}

function showTableOfContents(id) {

        document.getElementById(id).style.display = 'none';

        eval("document.getElementById('" + id + "_view').style.display = 'block'");

}