Add days to date while ignoring weekends and holidays - possible?

JavaScript
4

Date.parse(‘12/25/2008’)
You are correct- IE does require the ‘/’ format for digits, though it will correctly interpret text with commas-
Date.parse(‘April 10,2008’).
Add this method to the mix-

Date.prototype.addbizDays=function(n){
	var D=this;
	var num=Math.abs(n);
	var tem,count=0;
	var dir= (n<0)? -1: 1;
	while(count< num){
		D= new Date(D.setDate(D.getDate()+dir));
		if(D.isHoliday())continue;
		tem=D.getDay();
		if(tem!=0 && tem!=6) ++count;
	}
	return D;
}

//April doesn’t have any holidays, so I’ll use November-
var D=new Date(2008,10,15)
alert(D.addbizDays(10));
alert(D.addbizDays(-10));