1er div
2e div 
<!docytype html>
<html>
<head>
 <title>Javascript cacher/afficher un div</title>
 <link rel="stylesheet" type="text/css" href="../design/style.css"/>
 <script>
 function voirDiv(s) {
    let a = document.getElementById(s);
    a.style.display = (a.style.display=='none') ?'block':'none';
    return false;
 }
 </script>
</head>
<body>
    <a class="a" href="" onclick="return voirDiv('ledivacacher')">1er div</a>
    <div id="ledivacacher" style="display:none; width:200px;">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
        incididunt ut labore et dolore magna aliqua.
        Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
        ex ea commodo consequat.</p>
    </div>

    <br/>

    <a class="a" href="" onclick="return voirDiv('autrediv')">2e div</a>
    <div id="autrediv" style="display:none; width:200px;">
        <p>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut
        aliquip ex ea commodo consequat.
        Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
        incididunt ut labore et dolore magna aliqua.</p>
    </div>
</body>
</html>