Add day(s) to a Date object [duplicate]

Possible Duplicate:
How to add number of days to today's date?

I'm confused, I found so many different approaches, and which of them is actually correct?

So what is the correct way to add day(s) to a given Date?

Solution 1:

date.setTime( date.getTime() + days * 86400000 );

Note : Use it if calculating / adding days from current date.

Be aware: this answer has issues (see comments)

var myDate = new Date();
myDate.setDate(myDate.getDate() + AddDaysHere);

It should be like

var newDate = new Date(date.setTime( date.getTime() + days * 86400000 ));