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<!DOCTYPE html> <html> <body> <p>Enter a number and click OK:</p> <input id="id1" type="number" min="100" max="300" value="100"> <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> <script> function myFunction() { var inpObj = document.getElementById("id1"); if (inpObj.checkValidity() == false) { document.getElementById("demo").innerHTML = inpObj.validationMessage; } else { document.getElementById("demo").innerHTML = "Input OK"; } } </script> </body> </html> |