Page 271 - Web Applications (803) Class 12
P. 271
<title>Number Sum</title>
</head>
<body>
<h1>Add Two Numbers</h1>
<script>
var num1 = parseInt(prompt(“Enter the first number:”));
var num2 = parseInt(prompt(“Enter the second number:”));
// Check if the input is valid
if (!isNaN(num1) && !isNaN(num2)) {
var sum = num1 + num2;
alert(“Sum of the numbers: “ + sum);
} else {
alert(“Invalid input. Please enter valid numbers.”);
}
</script>
</body> </html>
Output:
4. Write JavaScript code for changing background colour of the web page on the click of a button. Create multiple
such buttons for different colours.
Ans. <html>
<head> <title> EVENT HANDLING </title>
<script>
function changeColor(color) {
document.body.style.background = color;
}
</script></head>
<body bgcolor=”blue”>
<p> WELCOME </p>
Practical Work 269

