<!DOCTYPE html>
<html>
<body>
<p>Enter a number and click OK:</p>
<input id="id1" type="number" max="100">
<button onclick="myFunction()">OK</button>
<p>If the number is greater than 100 (the input's max attribute), an error message will be displayed.</p>
<p id="demo"></p>
<script>
function myFunction() {
var txt = "";
if (document.getElementById("id1").validity.rangeOverflow) {
txt = "Value too large";
} else {
txt = "Input OK";
}
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>