Open Notepad and write the following Code !! <!DOCTYPE html> <html lang="en-US"> <head> <title>HTML Tutorial</title> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <script> $(document).ready(function () { var a = parseInt($('#txt1').val(), 10); var b = parseInt($('#txt2').val(), 10); $("#submit").on("click", function () { var sum = a + b; alert(sum); ...