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<!DOCTYPE html> <html> <body> <p>This example demonstrates a solution that will work for all browsers.</p> <button id="myBtn">Try it</button> <script> var x = document.getElementById("myBtn"); if (x.addEventListener) { x.addEventListener("click", myFunction); } else if (x.attachEvent) { x.attachEvent("onclick", myFunction); } function myFunction() { alert("Hello World!"); } </script> </body> </html>
