Prototype clone() Method

Syntax:

hash.clone()  ;

Return Value :

Returns a clone of hash.

Example:

<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>
<script>

function showResult(){

   var hash = new Hash({ a: 'apple'});
   var clone = hash.clone();
   alert("Value in hash : " + hash.get('a') );
   alert("Value in clone : " + clone.get('a') );
   hash.unset('a');
   clone.unset('a');
}

</script>
</head>

<body>

  <p>Click the button to see the result.</p>
  <br />
  <br />
  <input type="button" value="Result" onclick="showResult();"/>

</body>
</html>

To understand it in better way you can Try it yourself.