<!DOCTYPE html>
<html lang="en-US">
<body>
<h1>JS Leap Year or Not</h1>
<script>
var year = 2012;
if(year % 4 == 0)
{
if((year % 100 == 0) && (year % 400 != 0))
document.write(year+" is not a leap year");
else
document.write(year+" is a leap year");
}
else
document.write(year+" is not a leap year");
</script>
</body>
</html>