Change the anchor part of a link:
document.getElementById("myAnchor").hash = "newhashvalue";
<!DOCTYPE html> <html> <body> <p><a id="myAnchor" href="http://www.java2s.com/index.html#part2">Example link</a></p> <p id="demo"></p> <button onclick="myFunction()">Test</button> <script> function myFunction() {/* w ww .jav a 2s.co m*/ document.getElementById("myAnchor").hash = "newhashvalue"; document.getElementById("demo").innerHTML = "value changed"; } </script> </body> </html>