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<!DOCTYPE html> <html> <body> <img id="myImg" alt="Flower" src="klematis.jpg" width="150" height="113"> <p>Click the button to see how many attributes the img element have.</p> <button onclick="myFunction()">Try it</button> <p>The result should be 5 (the img element's id, alt, src, width and height attributes).</p> <p><strong>Note:</strong> In Internet Explorer 8 and earlier, the attributes property will return a collection of all <em>possible</em> attributes for the element, and will, in this example, display a much higher number than 5 (possibly 134).</p> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myImg").attributes.length; document.getElementById("demo").innerHTML = x; } </script> </body> </html>