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# Prototype identify() Method

This method returns element's id attribute if it exists, or sets and returns a unique, auto-generated id.

## Syntax:

    element.identify();

## Return Value:

- Returns HTML element ID

## Example:

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

    function showResult(){
       var str = $('apple').identify();
       alert("Apple's ID: " + str );
       var str = $('apple').next().identify()
       alert("Orange's ID: " + str );
    }
    </script>
    </head>

    <body>

      <p>Click the button to see the result.</p>

      <ul>
       <li id="apple">apple</li>
       <li>orange</li>
      </ul>

      <br />
      <input type="button" value="Click" onclick="showResult();"/>

    </body>
    </html>

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

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