<!doctype html>
<html>
<body>
<script>
var num, i, chk=0;
num=19;
for(i=2; i<num; i++)
{
if(num%2==0)
{
chk++;
break;
}
}
if(chk==0)
document.write(num + " is a Prime Number");
else
document.write(num + " is not a Prime Number");
</script>
</body>
</html>