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<!DOCTYPE html> <html> <body> <h1>JavaScript Statements</h1> <h2>The if...else Statements</h2> <p>Please input a number between 1 and 10:</p> <input id="numb" type="text"> <button type="button" onclick="myFunction()">Submit</button> <p id="demo"></p> <script> function myFunction() { var x, text; // Get the value of input field with id="numb" x = document.getElementById("numb").value; // If x is Not a Number or less than one or greater than 10, output "input is not valid" // If x is a number between 1 and 10, output "Input OK" if (isNaN(x) || x < 1 || x > 10) { text = "Input not valid"; } else { text = "Input OK"; } document.getElementById("demo").innerHTML = text; } </script> </body> </html>
