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# Prototype Object isHash() Method

This method returns true if obj is an instance of the Hash class, false otherwise.

## Syntax:

    Object.isHash(obj);

## Return Value :

- Returns true if obj is an instance of the Hash class, false otherwise

## Example:

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

    <script>

    function showResult(){

       myHash = new Hash({name:"prototype", version:1.6 });

       alert( "test 1: " + Object.isHash(new Hash({ })) );
       alert( "test 2: " + Object.isHash($H({ })) );
       alert( "test 3: " + Object.isHash({ }) );
       alert( "test 4: " + Object.isHash(myHash) );
    }

    </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.

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