<html> <body> <script language="JavaScript"> function function1() { var myEvent = document.createEventObject(); parent.document.all.myButton.fireEvent("onclick", myEvent); event.cancelBubble = true; } function function2() { alert('hello'); } </script> <button onclick="function1();">Click to see alert from</button> <button id="myButton" onclick="function2();">Click here to see alert</button> </body> </html>