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<!DOCTYPE html> <html> <body onhashchange="myFunction()"> <p>Click the button to change the anchor part of the current URL to #part5</p> <button onclick="changePart()">Try it</button> <p id="demo"></p> <script> // Using the location.hash property to change the anchor part function changePart() { location.hash = "part5"; var x = location.hash; document.getElementById("demo").innerHTML = "The anchor part is now: " + x; } // Alert some text if there has been changes to the anchor part function myFunction() { alert("The anchor part has changed!"); } </script> </body> </html>