Decrement the value of a slider control by "1" (default):
document.getElementById("myRange").stepDown();
Click the button to decrement the value of the slider control by "1".
<!DOCTYPE html> <html> <body> Points: <input type="range" id="myRange" value="60"> <button onclick="myFunction()">Test</button> <script> function myFunction() {//from w ww . jav a 2 s . c o m document.getElementById("myRange").stepDown(); } </script> </body> </html>