function showmenu() {
    var content = document.getElementById('content');
    var menu = document.getElementById('menu');
    var articles = content.childNodes;
    var showlink = document.getElementById('showmenu');
    var hidelink = document.getElementById('hidemenu');
    
    content.style.marginRight = '-120px';
    for(var x=0;x<=articles.length-1;x++) {
        if (articles[x].tagName && articles[x].tagName.toLowerCase()=='div') {
            articles[x].style.marginRight = '122px';
        }
    }
    menu.style.display = 'block';
    showlink.style.display = 'none';
    hidelink.style.display = 'inline';
}

function hidemenu() {
    var content = document.getElementById('content');
    var menu = document.getElementById('menu');
    var articles = content.childNodes;
    var showlink = document.getElementById('showmenu');
    var hidelink = document.getElementById('hidemenu');
    
    content.style.marginRight = '0px';
    for(var x=0;x<=articles.length-1;x++) {
        if (articles[x].tagName && articles[x].tagName.toLowerCase()=='div') {
            articles[x].style.marginRight = '0px';
        }
    }
    menu.style.display = 'none';
    showlink.style.display = 'inline';
    hidelink.style.display = 'none';
}