Write a JavaScript program to display first 20 even numbers on the webpage using write() method of document object.
<html>
<head>
<title>Display first 20 even numbers</title>
</head>
<body>
<script type="text/javascript">
var i = 2;
document.write("First 20 even numbers <br/>");
while(i<=20)
{
document.write(i + " ");
i = i + 2;
}
</script>
</body>
</html>
