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<!DOCTYPE html> <html> <head> <style> body { background-color: yellow; color: red; } </style> </head> <body> <p>Click the button to display the style properties of this document.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementsByTagName("STYLE")[0]; document.getElementById("demo").innerHTML = x.innerHTML; } </script> </body> </html>