<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript"
src="/javascript/prototype.js">
</script>
<script>
function hideElement(){
$('grandfather').hide();
}
function showElement(){
$('grandfather').show();
}
</script>
</head>
<body>
<p>Click the button to see the result.</p>
<div id="grandfather" >This is grand father
<div id="father"> This is father.
<div id="kid" >This is kid</div>
</div>
</div>
<br />
<input type="button" value="Hide" onclick="hideElement();"/>
<input type="button" value="Show" onclick="showElement();"/>
</body>
</html>