Untitled

<html>

<head>

<title>
My Javascript Trial Page
</title>

<script language = "JavaScript">

var firstNumber, secondNumber, number1, number2, sum ;

firstNumber= window.prompt("enter first variable"," ");

number1=parseInt(firstNumber);

secondsNumber= window.prompt("enter second variable"," ");

number2= parseInt(secondNumber);

sum = number1 + number2;

document.writeln("<H1>The sum is " + sum + " </H1>");

</script>

</head>

<body>

</body>

</html>