<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <h1>JavaScript Can Validate Input</h1> <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 the input field with id="numb" x = document.getElementById("numb").value; // If x is Not a Number or less than one or greater than 10 if (isNaN(x) || x < 1 || x > 10) { text = "Input not valid"; } else { text = "Input OK"; } document.getElementById("demo").innerHTML = text; } </script> </div> </form> </body> </html>
<button type="button" onclick="myFunction()">Submit</button>
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