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<!DOCTYPE html> <html> <body> <p>Use the addEventListener() method to attach a "toggle" event to a details element.</p> <p>Open the details.</p> <details id="myDetails"> <summary>Copyright 1999-2014.</summary> <p> - by Refsnes Data. All Rights Reserved.</p> <p>All content and graphics on this web site are the property of the company Refsnes Data.</p> </details> <script> document.getElementById("myDetails").addEventListener("toggle", myFunction); function myFunction() { alert("The ontoggle event occured."); } </script> </body> </html>
