need help with script to show date 3 days ahead

[gdubs12345]

I have this script that shows the current date. How can i change it to show the date 3 days ahead? thanks

<script>

var mydate=new Date()
var year=mydate.getYear()
if (year < 1000)
year+=1900
var day=mydate.getDay()
var month=mydate.getMonth()
var daym=mydate.getDate()
if (daym<10)
daym="0"+daym
var dayarray=new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday")
var montharray=new Array("January","February","March","April","May","June","July","August","September","October","November","December")
document.write(""+dayarray[day]+", "+montharray[month]+" "+daym+", "+year+"")

</script>

 

[rish3]

var tdl = new Date();
tdl.setDate(tdl.getDate() + 3);
alert(tdl);

 

[JCash]

Change first line of code:

var mydate=new Date(Date.now()+259200000);

 

[rish3]

Change first line of code:

var mydate=new Date(Date.now()+259200000);

Works most of the time, but can be wrong if it overlaps a DST change...

 

[gdubs12345]

thanks guys