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<html><body><p>Use the HTML DOM to assign an "ontoggle" 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").ontoggle = function() {myFunction()};function myFunction() { alert("The ontoggle event occured");}</script></body></html>