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<!DOCTYPE html> <html> <body> <p>Click the button to display the name of the button's first attribute.</p> <button onclick="myFunction()">Try it</button> <p><strong>Note:</strong> In Internet Explorer 8 and earlier, the attributes property will return a collection of all possible attributes for the element, and will, in this example, display the name of a different attribute.</p> <p id="demo"></p> <script> function myFunction() { var btn = document.getElementsByTagName("BUTTON")[0]; var x = btn.attributes[0].name; document.getElementById("demo").innerHTML = x; } </script> </body> </html>