// JavaScript Document

/* --------------------------------------- Rotate home page header images  -------------------------------------*/

expireDate = new Date
expireDate.setMonth(expireDate.getMonth()+6)

//banner image array
adBanner = new Array ("img/header_0.jpg","img/header_1.jpg","img/header_2.jpg","img/header_3.jpg")

imgCnt = adBanner.length
bannerCnt = parseInt(cookieVal("pageHit"))
bannerCnt ++
if (bannerCnt>=imgCnt){
		bannerCnt=0
}

document.cookie = "pageHit="+bannerCnt+";expires=" + expireDate.toGMTString()

function cookieVal(cookieName){
	thisCookie = document.cookie.split("; ")
	for(i=0; i<thisCookie.length; i++){
		if(cookieName == thisCookie[i].split("=")[0]){
		return thisCookie[i].split("=")[1]
		}
	}
	return 0
}

function setBanner(){
	document.promo_banner.src=adBanner[bannerCnt]	
}