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<!DOCTYPE html> <html> <body> <details id="myDetails" open> <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>Click the "Try it" button to find out if additional details are visible (open) or not.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { let x = document.getElementById("myDetails").open; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
