greeting script

<script language="JavaScript">
<!--
var name=prompt("Enter Your Name, Please.","name");
var today = new Date ()
var hrs = today.getHours();
document.writeln("<b>");
document.writeln("<b>");
if (hrs <= 12)
        document.write("Good Morning "+name+'!');
else if (hrs <= 18)
        document.write("Good Afternoon "+name+'!');
else
     document.write("Good Evening "+name+'!'); document.writeln("<br />");
// -->
</script>