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>

Output

prototype_element_object.htm