<!DOCTYPE html>
<html>
<body>
<p>Open the details.</p>
<details ontoggle="myFunction()">
<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>
<p><b>Note:</b> The details element and the ontoggle event is currently only supported in Chrome, Safari 6+, and Opera 15+.</p>
<script>
function myFunction() {
alert("The ontoggle event occured");
}
</script>
</body>
</html>