<!DOCTYPE html>
<html>
<body>
Points: <input type="range" id="myRange" step="5">
<p>Click the button to change the value of the step attribute of the slider control.</p>
<p>Try to move the slider up and down before and after you click the button to see the effect.</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> input elements with type="range" are not supported in IE 9 and earlier versions.</p>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myRange").step = "25";
document.getElementById("demo").innerHTML = "The value of the step attribute was changed from '5' to '25'.";
}
</script>
</body>
</html>