<html>
<body>
Points: <input type="range" id="myRange" value="60">
<p>Click the button to decrement the value of the slider control by "1" (each time you click).</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
document.getElementById("myRange").stepDown();
}
</script>
</body>
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</html>