Switch dynamic calendar

<script type="text/javascript">
//dynamic calendar
var d = new Date();
var n = d.getDay();
var nn = n;
switch(nn){
case 1:
alert("Monday");
break;
case 2:
alert("Tuesday");
break;
case 3:
alert("Wednesday");
break;
case 4:
alert("Thursday");
if (n==4) {
    document.write("<b><u>Today is Thursday</u></b>");
};
break;
case 5:
alert("Friday");
break;
case 6:
alert("Saturday");
break;
case 7:
alert("Sunday");
break;
}
//Switch функцията.С няккой добавки.
</script>