I have a working set of variables that gets & displays the current date, formats it, then populates a text field with it.

Using that date, i am adding X number of days, and displaying that new date in an LI elsewhere on the page.

The issue is that when i add, for example, 35 days to the current date (11/3/2010), i get an invalid date of (11/38/2010).

How do i get the number of days in any given month?

HERE IS MY HEAD CODE

var d = new Date();
var day = d.getDate();
var month = d.getMonth() +1;
var year = d.getFullYear();
var today = (month + "/" + day + "/" + year);
    $("#datepicker").val(today);
var dueDate = (month + "/" + (d.getDate()+35) + "/" + year);
    $("#duedatedisp").text(dueDate);

var myDate=new Date();
myDate.setDate(myDate.getDate()+35);

function daysInMonth(p_iMonth, p_iYear)
{
	return 32 - new Date(p_iYear, p_iMonth, 32).getDate();
}