<!DOCTYPE html>
<html>
<body>

<p>Enter a number and click OK:</p>

<input id="id1" type="number" min="100" max="300" required>
<button onclick="myFunction()">OK</button>

<p>If the number is less than 100 or greater than 300, an error message will be displayed.</p>

<p id="demo"></p>
<br> 
<center>
<p> Creater By <b> Sanusanth </b> </p>
</center>
<script>
function myFunction() {
  var inpObj = document.getElementById("id1");
  if (!inpObj.checkValidity()) {
    document.getElementById("demo").innerHTML = inpObj.validationMessage;
  } else {
    document.getElementById("demo").innerHTML = "Input OK";
  } 
} 
</script>
<br> 
<center>
<p> Creater By <b> Sanusanth </b> </p>
<a href="https://github.com/sanusanth">Visit Sanusanth</a>
</center>
</body>
</html>
